## Math textbook for first grade. Advanced level.

### The First Ten.

More—less. Longer — shorter.

How many children? How many trees? How many boats?

Show as many sticks as there are trees drawn.

Put as many circles as there are children drawn.

Show as many sticks as there are bags drawn.

Put as many circles as there are drawn cucumbers.

Put as many circles as there are drawn tomatoes.

Where is the flag located: up or down? left or right?

Where are the star? house? Christmas tree?

### Many — one.

Draw

Sign under the picture 1.

### Number 2.

Compose from sticks: a figure resembling V V.

Put 1 stick.

Put another 1 stick. How many sticks are there now?

How many hands does a person have? legs? eyes? ears?

Draw

Sign under the picture 2.

On the branch sat 1 bird. Another 1 bird flew to it.

How many birds are there now?

How many legs does the rooster have? the chick?

How many ears? How many wings?

### Number 3.

Build a triangle from sticks.

Draw III. Sign under the picture 3.

2 boys and 1 girl are riding bicycles. How many children are riding in total?

The children’s bicycle has 1 wheel in front, 2 in the back. How many wheels does the children’s bicycle have in total?

Arrange 3 squares in a row.

How else can you arrange 3 squares?

Which coins can you use to make up 3 kopecks?

Collect 3 kopecks from coins on the dissecting table.

Take 2 steps forward, 3 steps forward.

### Number 4.

Put 3 sticks and another 1 stick. How many sticks are there now?

Show as many sticks as there are legs on the table, on the chair.

Sign under the picture 4.

Draw

There were 4 birds on the branch. One flew away. How many birds are left on the branch?

How many legs does the goat have? How many wheels does the car have? How many wings does the butterfly have?

Arrange 4 squares in two rows. And how else can you arrange 4 squares?

Write by digits how many wheels the car has. How many legs does the cow have? the rooster? the dog?

### Number 5.

Put 4 sticks and another 1 stick. How many sticks are there now?

Show as many sticks as needed to form a star, as many ends as the star has.

Draw

Sign under the picture 5.

Which coins can you use to make up 5 kopecks?

Write by digits: how many fingers on one hand, how many paws does a cat have, how many legs does a chicken have.

Count and write by digits how many nuts in each column.

How many white rabbits?

How many black rabbits?

How many rabbits in total?

How many carrots on the left?

How many carrots on the right?

How many carrots in total?

### Number 6.

Put as many circles as there are legs on the beetle, as drawn on the cherry branch.

Compose from 6 sticks:

Put 5 sticks and one more. How many sticks are there now?

Draw 6 cherries and sign under the picture 6.

4+1=5 5+1 = 6

Arrange 6 squares in two rows of 3.

How else can you arrange 6 squares?

Collect 6 kopecks from coins on the dissecting table.

How can you distribute 6 gingerbreads on 2 saucers?

What numbers are missing?

Count from 1 to 6 and from 6 to 1.

3+1= 5+1= 1+1 =

4+1= 2+1= 5+1 =

### Number 7.

Encircle as many cells as there are drawn nuts, as many as there are apples in the vase.

Compose from 7 sticks:

Put 6 sticks and another 1 stick. How many sticks are there now?

Draw 7 apples and sign under the picture 7.

The girl dried 6 maple leaves and 1 oak leaf. How many leaves did she dry in total? There are 7 pears growing on the branch. The boy picks 1 pear. How many pears will remain on the branch?

6 + 1 = 7 7-1 = 6

Arrange 7 squares. 4 on top and 3 on the bottom.

How else can you arrange 7 squares?

How can you distribute 7 apples on 2 plates? Collect 7 kopecks from coins on the dissecting table. Count from 1 to 7 and from 7 to 1.

4+1 7-1 3-1

5+1 6-1 3+1

6+1 5-1 5-1

### Number 8.

Put as many circles as there are berries on the currant branch.

Compose 2 squares from sticks:

Put 7 sticks and 1 stick. How many sticks are there now?

Draw 8 balls and sign under the picture 8.

Kostya learned to write 7 digits, and then 1 more digit. How many digits did he learn to write in total?

Yura had 8 pigeons. 1 pigeon flew away. How many pigeons are left for Yura?

Arrange 8 sticks as 7 and 1. How else can you arrange 8 sticks?

How can you distribute 8 pencils into 2 boxes?

Collect 8 kopecks from coins on the dissecting table.

Count from 1 to 8 and from 8 to 1.

5 + 1 8-1 5 – 1

6 + 1 7-1 4 – 1

7 + 1 6-1 4 + 1

### Number 9.

Compose 3 triangles from sticks:

Put 8 sticks and another 1 stick. How many sticks are there now?

Draw 9 Christmas trees and sign under the picture 9. What numbers are missing?

Semyon cut out 8 circles, and then 1 more circle. How many circles did Semyon cut out in total?

9 boys played hide-and-seek. One boy left the game. How many boys continued to play?

Arrange 9 circles as 8 and 1. How else can you arrange 9 circles?

How can you arrange 9 mushrooms into 2 piles? Collect 9 kopecks from coins on the dissecting table. Count from 1 to 9 and from 9 to 1.

4 + 1 9 – 1 5 – 1

6 + 1 8 – 1 5 + 1

8 + 1 7 – 1 4 – 1

### Number 10.

Compose from 10 sticks:

Lena drew 9 small mushrooms and 1 big mushroom. How many mushrooms did Lena draw in total?

There were 10 colored pencils in the box. The boy took 1 pencil. How many pencils are left in the box?

Draw 10 mushrooms and sign under the picture 10. What numbers are missing?

Arrange 10 squares in three rows. How else can you arrange 10 squares?

How can you arrange 10 nuts into 2 saucers? Collect 10 kopecks from coins on the dissecting table. Count from 1 to 10.

Count from 10 to 1.

### Addition and Subtraction.

Add and subtract 1.

### 1 2 3 4 5 6 7 8 9 10

2. To decorate the classroom, children brought 6 pots of flowers, and then 1 more pot. How many pots of flowers did the children bring in total?

3. Lena brought 9 yellow leaves to the class and 1 green leaf. How many leaves did Lena bring in total?

4. | 2+1 | 6+1 | 9 + 1 |

4 + 1 | 5+1 | 7 + 1 | |

1+1 | 8+1 | 3 + 1 | |

5. | 2-1 | 5-1 | 8-1 |

3-1 | 6-1 | 9-1 | |

4-1 | 7-1 | 10-1 |

6. A week has 7 days. Children don’t study one day a week. How many school days are there in a week?

7. Natasha had 10 flowerpots at home. She took one flowerpot to school. How many flowerpots are left at Natasha’s?

8. 2-1 5-1 9-1

4-1 7-1 6-1

8-1 10-1 3-1

9. 1+1 2+1 3+1

2-1 3-1 4-1

4+1 5+1 6+1

5-1 6-1 7-1

7+1 8+1 9-1

8-1 9-1 10-1

10. There were 6 birds on a branch. Then 1 more bird flew in. How many birds are now on the branch?

11. There were 7 swallows on the wire. One swallow flew away. How many swallows are left?

12. 6 + 1 7-1 8+1 9-1

6-1 7+1 8-1 9+1

Add and subtract 2.

13. 2 + 1 + 1 6 + 1 + 1

4 + 1 + 1 8 + 1 + 1

Count by 2:

14. Mom brought 4 baskets of carrots from the garden, and Tanya brought 2 baskets. How many baskets of carrots did they bring in total?

15. Mitya helped mom harvest potatoes from the garden. Mom collected 8 sacks, and Mitya 2 sacks. How many sacks of potatoes did mom and Mitya collect together?

16. 4+2 2+2 6-1 6+2

2 + 2 6+2 9-1 8-1

6 + 2 8+2 5-1 8+2

8 + 2 4+2 7-1 10-1

17. 4-1-1 8-1-1

6-1-1 10-1-1

18. Vlad had 6 nails. He took 2 nails to fix the sled. How many nails does Vlad have left?

19. There were 10 planks in the barn. Dad made bookshelves for the son from 2 planks. How many planks are left in the barn?

20. 2 + 2 10-2 2 + 2 4 + 2

4+2 8-2 4-2 6-2

6+2 6-2 6+2 8+2

8+2 4-2 8-2 10-2

21. There were 8 books on the shelf. Mom put 2 more books on the shelf. How many books are now on the shelf?

22. There were 8 books on the table. Mitya took 2 books from the table. How many books are left on the table?

23. 6+2 4-2 5+1 5-1

4+2 8-2 9+1 9-1

2+2 10-2 7+1 8-1

8+2 6-2 6+1 10-1

25. Lida brought 3 oak leaves to class and 2 maple leaves. How many leaves did she bring in total?

26. Misha brought 5 pine cones from the forest and 2 spruce cones. How many cones did Misha bring in total?

27. 1+2 4-1 8-1 5+2

3+2 3-1 7-1 8-1

5+2 6-1 10-1 7+2

7+2 5-1 9-1 10-1

28. 3-1-1 7-1-1

5-1-1 9-1-1

29. 9-2 1+2 1+2 3+2

7-2 3+2 3-2 5-2

5-2 5+2 5+2 7+2

3-2 7+2 7-2 9-2

30. Masha had 5 buttons.

She sewed 2 buttons on her coat. How many buttons does Masha have left?

31. Lena had 9 squares on her desk. She put 2 squares in the box. How many squares are left on Lena’s desk?

32. Vanya had 7 sheets of paper. He made a notebook out of 2 sheets. How many sheets of paper are left for Vanya?

33. 1+2 9-2 5+2 3-2

3+2 7-2 5-2 7-2

5+2 5-2 7+2 5-2

7+2 3-2 7-2 9-2

34. Create four addition problems with the number cards and solve them.

For example: 3+2 = 5.

35. Create four subtraction problems with the number cards and solve them.

36. 5 + 1 4 + 2 5 + 2 8-1

8+1 8 + 2 3 + 2 6-2

7-1 10-2 7-2 9-1

10-1 8-2 9-2 10-2

37. Ira found 7 white stones by the river and 1 red one. How many stones did she find in total?

… Ira had 8 stones. She gave 2 stones to her friend. How many stones does Ira have left?

38. 9+1 8+2 3+2 0-1

7+1 6+2 7+2 8-2

9-1 6-2 7-2 5-2

6-1 10-2 9-2 9-1

### Add and subtract 3.

39. What numbers can you make from the number cards to get 3?

41. For planting trees, 1 hole was dug, and then 3 more holes were dug. How many holes were dug in total?

42. 1+3 4 + 3 2+3 1+3

2 + 3 3 + 3 1 + 3 4 + 3

3+3 2 + 3 4+3 3+3

43. Sergey dried 2 maple and 3 birch

leaves. How many leaves did he dry in total?

44. On the way to school, Lyuba saw 4 big apple trees and 3 small ones. How many apple trees did Lyuba see in total?

45. 3+2 4+2 5+2 5+3

3 + 3 4+3 5+3 4+3

2 + 2 6 + 2 7+2 7 + 3

2+3 6 + 3 7+3 6+3

46. Create four addition problems with the number cards and solve them.

47. Vasya had:

How many kopecks did Vasya have in total?

48. Mom bought Nadya an album for 5 rubles and a book for 3 rubles for the holiday. How much money did Mom spend on this purchase?

49. Create a problem where you need to add 3 rubles to one ruble.

50. 3+1 4 + 3 9+1 8 + 2

1 + 3 6 _{+} 3 8-1 6-2

3 + 2 5 _{+} 3 7-1 7-2

2 + 3 7 + 3 9-1 9-2

51. 1 + 3 5 + 3 6-1 8-2

4 + 3 7 + 3 9-1 5-2

3 + 3 4+3 7-1 9-2

2 + 3 6+3 10-1 7-2

52. Put 3 sticks on the left and the same number of sticks on the right. How many sticks will there be in total?

53. For the kindergarten, they bought 3 watering cans at first, and then the same number more. How many watering cans did they buy in total?

54. For the school, they bought 2 hammers at first, and then the same number more. How many hammers did they buy in total?

55. 4 + 3 5-1 6-2 9-2

6 + 3 8-1 8-2 7-1

5 + 3 4-1 7-2 10-2

7 + 3 9-1 10-2 8-1

56. 4-2-1 6-2-1 8-2-1 10-2-1

5-1-2 7-1-2 9-1-2 10-1-2

57. Put 4 cups on the desk. Take 3 cups and put them in the box. How many cups are left on the desk?

58. 1+3 2+3 3+3 4+3

4-3 5-3 6-3 7-3

59. Vale needed to wash 7 plates. She has already washed 3 plates. How many plates does she have left to wash?

60. 1+3 7-3 3+3 1+3

2 + 3 6-3 6-3 4-3

3+3 5-3 2 + 3 4+3

4+3 4-3 5-3 7-3

61. 5+3 6+3 7+3

8-3 9-3 10-3

62. 1+3 3+3 5+3 7+3

4-3 6-3 8-3 10-3

2+3 4+3 6+3 4+3

5-3 7-3 9-3 7-3

63. Vanya needs to draw 6 mushrooms. He has already drawn 3 mushrooms. How many mushrooms does he have left to draw?

64. The carpenter needed to make 4 legs for the table. He has already made 3 legs. How many legs does he have left to make?

65. Create a problem where you need to subtract 3 from 5.

66. 3+3 5+3 9-3 5-3

6-3 8-3 7-3 8-3

1 +3 7+3 10-3 7+3

4-3 10-3 8-3 7-3

67. Create four subtraction problems with the number cards and solve them.

68. 2+3 4+3 4-3 7-3

5-3 7-3 8-3 7+3

3+3 7+3 6+3 9-3

6-3 10-3 9-3 10-3

69. 6 boys were playing in the yard. Two boys went home. How many boys are left in the yard?

… There were 4 boys in the yard. Then 3 more boys came. How many boys are there in the yard now?

70. 1+3 6+3 8-3 7+3

4-3 9-3 10-3 7-3

5+3 7+3 9-3 5+3

8-3 10-3 7-3 8-3

71. 7+1 6+2 5-2 4+3

6-1 8+2 8-2 7-1

8-1 5+2 9-2 6+3

10-1 7+2 7-2 9+1

Add and subtract 4.

72. What numbers can you make from the number cards to get 4?

73. 1 + 2 + 2 3 + 2 + 2 5 + 2+2

2+2+2 3+3 + 1 5+1+3

2+1 + 3 4+2 + 2 6 + 2+2

74. Put 2 cups on the left and 4 cups on the right. How many cups are there in total?

75. The brother helped the sister make counting sticks. The brother made 6 sticks, and the sister made 4. How many sticks did they make in total?

76. Vitya cut 3 black circles and 4 green circles from the fabric and made a pencil case out of them. How many circles in total went into making the pencil case?

77. Create a problem in which you need to add 5 to 4.

78. 4+4 5+4 4+1 4+3

2+4 3 + 4 1+4 3 + 4

6+4 2 + 4 4+2 6 + 4

1+4 6+4 2+4 5 + 4

79. Create 4 addition problems with the help of cut-out cards and solve them.

80. 2+4 3+4 8-2 5+4

4+4 5+4 5-2 10-2

6+4 6+4 9-2 6-2

1+4 4+4 7-2 3+4

81. There were 4 birch trees in the glade. In the fall, the same number of birch trees was planted. How many birch trees are there in total on the glade?

82. There were 4 apple trees in the garden. In the fall, the same number of apple trees was planted. How many apple trees are there in the garden now?

83. 1+4 5-1 10-2 6-3

3+4 8-1 8-2 8-3

6+4 7-1 9-2 7-3

5 + 4 10-1 7-2 10-3

84. 2 + 4 6-1 8-2 4-3

4 + 4 4-1 6-2 9-3

3+4 9-1 7-2 5-3

6 + 4 7-1 5-2 8-3

85. 5-2-2 7-2-2 9-2-2

5-1-3 7-1-3 9-1-3

6-2-2 8-2-2 10-2-2

86. Place 6 sticks on the desk. Take 4 sticks and put them in the box. How many sticks are left on the desk?

87. 2+4 4+4 6+4

6-4 8-4 10-4

88. 1 + 4 3 + 4 5+4

5-4 7-4 9-4

89. Sima was setting the table for breakfast. There were 6 glasses on the shelf. Sima took 4 glasses. How many glasses are left on the shelf?

90. There were 7 plates on the shelf. Sima took 4 plates. (Ask a question and solve the problem.)

91. Create a problem in which you need to subtract 4 from 10.

92. 2+4 | 6- | 4-4 | 3+4 | 6-4 |

6-4 | 10- | -4 | 7-4 | 6+4 |

4+4 | 1- | ^4 | 5+4 | 9-4 |

8-4 | 5 | -4 | 9-4 | 7-4 |

93. Create 4 subtraction problems with the help of cut-out cards and solve them.

94. 4+4 6-4 7-4 6+4

6+4 8-4 9-4 8-4

3+4 5-4 10-4 5-4

5+4 10-4 8-4 7-4

### 95.

96. Natasha first drew 6 Christmas trees, and then another 4 Christmas trees. How many Christmas trees did she draw in total?

… Natasha drew 10 Christmas trees. She colored 2 Christmas trees. How many Christmas trees does she have left to color?

97. 2 + 4 8-4 7-3 3 + 4

4 _{+} 4 6-4 7-4 9-3

3 + 4 7—4 10-3 5+4

6 + 4 10-4 10-4 7-2

98. 5 + 4 6 + 2 4+3 5 + 3

7-4 3 + 2 7 + 3 8 + 2

10-4 7 + 2 5 + 3 5 + 4

6-4 5 + 2 6 + 3 9+1

### Add and subtract 5.

99. What numbers can you combine to make 5?

100. Place 5 circles on the left and 1 circle on the right. How many circles are there in total?

Place 1 circle on the left and 5 circles on the right. How many circles are there in total?

101. For the holiday, 1 large flag and 5 smaller flags were hung on the school building. How many flags were hung on the school building in total?

102. In the school hall, 5 pictures were hung on one wall and the same number on the other.

Ask a question and solve the problem.

103. Create a problem where you need to add 3 and 5.

104. 5 + 1 5 + 3 1 + 5 2 + 4

1 + 5 3 + 5 3 + 5 2 + 5

5 + 2 5 + 4 5 + 5 5 + 4

2 + 5 4 + 5 2 + 5 5 + 5

105. Create four addition problems with the help of cut-out cards and solve them.

106. 5 + 5 5 – 2 5 – 3 6 – 4

2 + 5 8 – 2 7 – 3 8 – 4

4 + 5 7 – 2 9 – 3 7 – 4

3 + 5 9 – 2 8 – 3 9 – 4

107. Place 1 circle and 5 circles in the empty box. How many circles are there in the box now?

… Take out 5 circles from the box. How many circles are left in the box?

109. The duty was to water 8 flower pots. They already watered 5 flower pots. How many more flower pots do they need to water?

110. Petya had 7 planks. 5 planks went for the sled repair.

Ask a question and solve the problem.

111. Create a problem where you need to subtract 5 from 10.

112. 5 + 1 5 + 2 5 + 3 5 + 4

1 + 5 2 + 5 3 + 5 4 + 5

6 – 1 7 – 2 8 – 3 9 – 4

6 – 5 7 – 5 8 – 5 9 – 5

113. 2 + 5 6 – 5 9 – 5 8 – 5

4 + 5 8 – 5 6 – 5 6 – 5

3 + 5 10 – 5 8 – 5 7 – 5

5 + 5 7 – 5 10 – 5 9 – 5

114. Kolya made 4 flags for the holiday, and Manya made 5. How many flags did they make in total?

115. Kolya has to make 8 flags. He made 4 flags. How many flags does he have left to make?

116. Manya has to make 7 flags. She made 5 flags.

Ask a question and solve the problem.

117. 2 + 5 6 – 5 8 + 1 5 + 2

4 + 5 8 – 5 6 – 1 8 – 2

1 + 5 10 – 5 9 – 1 10 – 2

5 + 5 7 – 5 10 – 1 9 – 2

118. Create four subtraction problems with the help of cut-out cards and solve them.

119. 3 + 3 4 – 3 4 + 4 6 – 4

5 + 3 7 – 3 1 + 4 7 – 4

7 + 3 9 – 3 3 + 4 10 – 4

6 + 3 10 – 3 5 + 4 9 – 4

120. 2 + 5 8 – 5 10 – 3 5 – 4

5 + 5 6 – 5 8 – 4 6 – 3

1 + 5 10 – 5 7 – 5 3 + 5

4 + 5 9 – 5 8 – 3 6 + 4

### Add and subtract 6.

121. What numbers can you combine to make 6?

122. Place 6 squares on the left and 1 square on the right. How many squares are there in total?

Place 1 square on the left and 6 squares on the right. How many squares are there in total?

123. Children played hide and seek. One was seeking, and 6 were hiding. How many children were there in total?

124. Children were playing in the yard. 2 girls were holding a rope, and 6 girls were jumping over it. How many girls were playing in the yard?

125. Create a problem where you need to add 4 and 6.

126. 6 + 2 6 + 3 1 + 6 2 + 5

2 + 6 3 + 6 3 + 6 2 + 6

6 + 1 6 + 4 4 + 6 4 + 5

1 + 6 4 + 6 2 + 6 4 + 6

127. Create three addition problems with the help of cut-out cards and solve them.

128. 2 + 6 7 – 3 8 – 4 6 – 5

4 + 6 5 – 3 5 – 4 7 – 5

1 + 6 8 – 3 7 – 4 8 – 5

3 + 6 10 – 3 10 – 4 9 – 5

129. The squirrel in the cage had 1 nut. Volodya put 6 more nuts in the cage. How many nuts does the squirrel have now?

… The squirrel had 7 nuts. She ate 6 nuts. How many nuts does the squirrel have left?

130. 1 + 6 2 + 6 3 + 6 4 + 6

7 – 6 8 – 6 9 – 6 10 – 6

7 – 6 = 8 – 6 = 9 – 6 = 10 – 6 = 7 – 4 – 2 8 – 4 – 2 9 – 3 – 3 10 – 2 – 4

131. Lyuba had to wash 8 handkerchiefs. She washed 6 handkerchiefs. How many more handkerchiefs does she need to wash?

132. Vova had to cut out 10 squares. He cut out 6 squares.

Ask a question and solve the problem.

133. Create a problem where you need to subtract 6 from 9.

134. 6+1 6+2 6+3 6+4

1+6 2+6 3 + 6 4+6

7-1 8-2 9-3 10-4

7-6 8-6 9-6 10-6

135. 2+5 7-6 8+1 6+2

4+6 9-6 7-1 9-2

1+6 8-6 10-1 7-2

3+6 10-6 9-1 10-2

136. One boy caught three fish, and another caught 6. How many fish did they catch in total?

… The boys caught 9 fish. They cooked soup from 5 fish. How many fish do they have left?

137. Create a problem where you need to add 2 and 6.

Create a problem where you need to subtract 6 from 9.

138. 6+3 3+4 3 + 5 4 + 6

7-3 8-4 7-5 7-6

9-3 7-4 10-5 9-6

10-3 10-4 9-5 8-6

139. Create three subtraction problems with the help of cut-out cards and solve them.

140. 8-1 8-3 9-6 9-4

5+2 7-4 7-5 7-6

6-3 9-2 8-6 3+5

8-4 5+5 6+4 9-6

Add and subtract 7.

141. What numbers can you combine to make 7?

142. Add 6 to 1 stick. What will you get? Add 1 to 6 sticks. What will you get?

143. 7 + 2 7 + 3 1 + 6 3 + 6

2-^7 34 7 1 + 7 3 + 7

7+ 1 1 + 7 2 + 6 2 + 5

1 + 7 2 + 7 2 + 7 2+7

144. Children played “school.” One girl was the teacher, and 7 girls were students. How many children were playing in total?

145. Create a problem where you need to add 3 and 7.

146. 2 + 7 2 + 4 2 + 5 3 + 6

1 + 7 8-4 8-5 7-6

3 + 7 10-4 10-5 9-6

7 + 3 9-4 9-5 10-6

147. On a boy’s birthday, 7 friends came to visit him. How many boys were there in total?

… There were 8 boys in the room. Then 7 boys went home. How many boys are left?

148. 1 + 7 2+7 3+7

8-7 9-7 10-7

8-7= 9-7= 10-7 =

8-4-3 9-3-4 10-5-2

149. Create a problem based on this picture.

150. A girl bought a candy for 3 rubles. She gave 5 rubles at the cashier. How much change did she receive?

151. Mom bought a cup for 7 rubles. She gave 10 rubles at the cashier.

Ask a question and solve the problem.

152. 7 + 1 7+2 7+3 9-7

1+7 2+7 3 + 7 8-7

8-1 9-2 10-3 2+7

8-7 9-7 10-7 10-7

153. Create two addition and two subtraction problems using the cut-out cards.

154. 2+7 3+4 3+5 4+6

8-7 8-4 6-5 8-6

10-7 9-4 10-5 10-6

9-7 10-4 8-5 7-6

### Add and subtract 8.

155. What numbers can you combine to make 8?

156. Place 8 circles on the left and 1 circle on the right. How many circles are there in total?

Place 1 circle on the left and 8 circles on the right. How many circles are there in total?

8 + 1 1 + 8 8 + 2 2 + 8

9-1 9-8 10-2 10-8

157. Nadya cut out 2 stars, and Vasya cut out 8. How many stars did they cut out in total?

158. Nadya has to cut out 10 stars. She cut out 8 stars. How many stars does she have left to cut out?

159. Vasya has to cut out 9 stars. He cut out 8 stars.

Ask a question and solve the problem.

160. 8 + 1 1 + 8 8+1 8+2

1 + 8 9-8 1 + 8 2 + 8

8 + 2 2 + 8 9-1 10-2

2 + 8 10-8 9-8 10-8

161. Create two addition and two subtraction problems using the cut-out cards.

162. 1 + 8 5 + 2 3 + 4 3 + 6

10-8 9-2 9-4 10-6

2 + 8 6 + 3 2 + 5 2 + 7

9-8 10-3 8-5 8-7

### Add and Subtract 9.

163. Girls danced in a circle. One girl walked in the middle, and 9 girls walked around. How many girls were there in total?

164. 9+1 7+1 6 + 3 10-9

1+9 10-1 7-3 8-3

10- 1 5 + 2 5 + 4 7-2

10-9 9-2 10-4 9-4

165. Sony had 5 fabric scraps. Mom gave her the same amount. How many fabric scraps does Sony have now?

… Sony had 10 fabric scraps. She used 9 of them to make a blanket for her doll.

Ask a question and solve the problem.

166. 9+1 3 + 5 1 + 7 1+9

10-1 7-5 10-7 9-7

1+9 2 + 6 2 + 8 10-6

10-9 9-6 9-8 10-8

167. 9-3 7+3 8-5 10-8

10-5 5-4 6-4 2 + 7

7 + 2 3 + 6 4+5 10-9

9-8 10-3 9-7 6 + 4

Addition Table.

1+1= 2

2+1= 3 1+2= 3

### Subtraction with a Remainder of 0.

2-2 = 0

168. 3-3 5-5 8-8 9-9

6-6 7-7 4-4 2-2

169. 4+4- 8 4 + 6-8 1 + 7-8

2+6- 7 1 + 8-9 3 + 6-4

3 + 7-10 4 + 5-6 2 + 8-6

2+5- 5 1+6-7 3 + 7-10

170. 3 + 7-6 6-3-3 7-2-4

5 + 2-7 8-4-4 9-6-3

1 + 8-8 10-5-5 10-3-5

### Meter.

What do we measure with a meter?

171. Measure the length of the classroom in steps.

Measure the length of the classroom with a meter.

Measure the width of the classroom in steps, then with a meter.

172. Measure the length of the ribbon, the length of the cord with a meter.

173. Create a meter from sturdy paper or ribbon.

At home, measure the length and width of the room with a meter.

174. Measure a thread with a length of 3 meters. Then cut 1 meter from it. How many meters of thread will remain?

175. Measure a thread with a length of 5 meters. Cut 2 meters from it. How long is the remaining thread?

### The word “meter” is abbreviated as m.

176. 3 meters of fabric were used for a shirt, and 4 meters for a dress. How many meters of fabric were used for both the shirt and the dress?

… The seamstress had 9 meters of fabric. She used 7 meters for a shirt and a dress. How many meters of fabric does the seamstress have left?

177. The carpenter cut 3 meters from a board, and then another 2 meters. (Ask a question and solve the problem.)

… The carpenter had a 6-meter-long board. He cut 5 meters from it to repair the floor. How long is the board that he has left?

### REVIEW.

178. 2+2+2 5+1-2 1 +2+3

5+1 + 2 8 + 2-1 4 + 3 + 2

4+2+1 5-2-2 6-3-1

6+2 + 2 9-1-2 10-2-3

179. Semyon cut out 5 Christmas trees from green paper and 2 Christmas trees from white paper. How many Christmas trees did he cut out in total?

… Semyon cut out 7 Christmas trees. He gave three of them to his sister. How many Christmas trees does Semyon have left?

180. Create a problem that requires adding 6 and 3.

181. Create a problem that requires subtracting 3 from 10.

184. 2 + 2 + 4 2+5+ 1 3 + 4-5

3 + 3 + 4 4+5+1 10 – 2 – 5

7-4-1 8-5+5 9-5+4

10-4-2 10-5-2 7 + 3-5

185. Svetlana bought 6 meters of ribbon. She used 4 meters for decorating portraits. How many meters of ribbon does she have left?

… Svetlana had 2 meters of ribbon, and she bought an additional 5 meters. How many meters of ribbon does Svetlana have now?

186. Create a problem that requires adding 5 and 4 meters.

187. Create a problem where you subtract 5 meters from 10 meters.

188. 1 + 4 + 4 1 + 5 + 4 6-5 + 4

3 + 4 + 3 3 + 5 + 2 10-5-5

8-4-4 6-3-3 9-4-4

10-3-4 9-5-3 8-5+5

189.1+6 8-6 3+7-10-8

3 + 6 10-6 2 + 7 8-7

2 + 6 7-6 2 + 8 10-9

4 + 6 9-6 1 + 9 10-7

190. Create examples for the picture

191. Lena had black and colored pencils. She had 2 black pencils, and colored pencils…. How many pencils did Lena have in total?

Complete and solve the problem.

192. Vasya bought a book and an album. The album cost 6 rubles, and the book … rubles. How much did the book and the album cost together?

Complete and solve the problem.

193. Dad bought a bucket and a shovel for his son. How much money did he pay for this purchase?

Complete and solve the problem.

194. 2 + 6-4 1 + 7-6 1 + 9-8

4 + 6-5 3 + 7-8 10-9+7

9-6 + 6 9-8 + 7 9-6 + 5

7-6 + 4 9-7 + 6 10-7-3

195. 9-6+5 8-7+6 10-9+7

8-6 + 7 10-7 + 7 9-8 + 8

10-6 + 3 9-7 + 5 10-3-5

7-6 + 9 10-8 + 6 9-4-2

196. Seven people are supposed to have lunch. Nina put 5 spoons and 3 forks on the table.

How many more spoons does she need to bring?

How many more forks does she need to bring?

197. Place 3 sticks. How many more sticks do you need to add to get 4 sticks?

How many more sticks do you need to add to 4 sticks to get 6 sticks?

198. 2 + … = 3 …+2= 6 3 + …=8

4 + … = 6 …+3 = 7 7 + … =10

7 + … = 8 …+5 = 10 … + 2=7

1 +… = 4 … + 4= 9 …+8=9

199. Number guessing game. The student added a number to 4, which is written on another card, and got 6. What number is written on the other card?

Conduct such a game.

## SECOND TEN.

### Counting and writing numbers.

200. Place 1 stick on the set of ten sticks. How many sticks will you have?

Place 3 sticks on the set of ten sticks. How many sticks will you have?

201. Place as many sticks as drawn here.

How many tens and units are there in this number?

202. 1) Place four sticks.

2) Place fourteen sticks. How many tens and units are there in this number?

203. How many tens and units are there in the number fifteen? eighteen? nineteen?

How many tens are there in the number twenty?

204. Name the number that consists of:

1 ten and 5 units;

1 ten and 9 units;

two tens.

205. Count how many squares are in each pair of columns and read the numbers below them.

206. How many tens and units are there in the numbers: 11? 13? 16? 18? 19?

Tens. Units.

207. Place the card with the digit 1 on the left side of the table, and the card with the digit 4 on the right side. What number will you get?

Place the card with the digit 1 on the left side, and the card with the digit 9 on the right side. What number will you get?

208. Read the numbers: 13, 15, 16, 19, 20.

209. Write the numbers:

1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18 19 20

210. In the sequence of cards from 11 to 20, name the missing numbers in order:

211. What page comes after page 11? after page 16? after page 18?

212. 7 + 1 7 + 2 6 + 2-1 8-2-2

6-1 8-2 5 + 2- 1 8-2- 1

10-1 7-2 7 + 2+ 1 7-2- 2

8-1 10-2 10-2-2 10-1-2

213. Create a problem where you need to add 2 to 8.

214. 5 + 3 6 + 4 3 + 3 + 3 1 + 4 + 4

6 — 3 8 — 4 4 + 3 + 3 2 + 4 + 4

9-3 7- 4 8-3-3 10-4 -4

7-3 9-4 10-3-3 9-4-3

215. Create a problem where you need to subtract 3 from 10.

216. 4 + 5 3 + 6 3 + 5-6 1 + 6-5

7-5 10-6 4 + 6-5 2 + 6-5

9-5 7-6 2+5-6 9-5+6

8-5 9-6 3+6-5 8-6+5

### 217. Create a problem where you need to subtract 6 from 8.

218. 3 + 7 1+9 1+8-7 10-2-7

1+8 10-9 10-9 + 8 8 + 1-8

9-7 10-7 10-8+7 2 + 7-6

10-8 9-8 1+9-8 10-3-5

219. Kolya has 10 kopecks and 2 kopecks. How many kopecks does Kolya have in total?

220. 10 + 2 10 + 5 1 + 10 4+10

10 + 6 10+8 3+10 7+10

10 + 4 10 + 7 6+10 9+10

221. Nadya has 10 kopecks and 5 kopecks. How many kopecks does Nadya have in total?

222. The brother has 10 kopecks, and the sister has the same amount. How many kopecks do the brother and sister have together?

223. 10 + 2 10+3 1 + 10 5+10

10 + 4 10 + 5 4+10 3+ 10

10+6 10 + 7 8+10 9+10

10 + 8 10 + 9 6+ 10 7+10

224. 10+ 4 10+ 3 10+ 6 10+ 9

4+10 3+10 6+10 9+10

225. The seamstress had 15 buttons. She sewed 5 buttons onto a shirt. How many buttons does the seamstress have left?

227. 12-2 16-6 12-10 13-10

14-4 19-9 15- 10 18-10

18-8 17-7 16-10 14-10

15-5 13-3 17-10 19- 10

228. Distribute 14 sticks into two piles: 4 sticks in one pile, and the rest in the other. How many sticks are in the other pile?

229. There are 16 pencils in two boxes: 6 pencils in one box, and the rest in the other. How many pencils are in the other box?

230. 10+ 2 10+ 6 5+10 7+10

2+10 6+10 10+ 5 10+ 7

12- 2 16- 6 15-10 17-10

12-10 16-10 15- 5 17- 7

231. 3+ 3+10 5-2+10 14-10+ 2

6 + 2+10 7-3+10 15-10+ 4

2 + 5+10 9-4+10 17-10+ 3

232. In the kindergarten, there were 14 balls. Of them, 10 are black, and the rest are white. How many white balls were there?

233. The pioneers made 18 toys for the kindergarten. 8 toys are for the older group, and the rest are for the younger group. How many toys did the pioneers make for the younger group?

234. 4 + 4 + 10 9-3+10 14-10 + 6

2 + 6+10 7-5+10 13-10 + 7

1+8+10 10-6+10 19-10-8

3 + 7+10 9-4+10 18-10-3

### Addition without crossing over a decade.

235. How many tens and units are there in the numbers: 12? 16? 18? 19?

236. From the forest, they brought 12 pine logs and 2 birch logs. How many logs were brought in total?

237. 2 + 4 13+1 14 + 2 18+1

12 + 4 17+1 13 + 3 12 + 3

4 + 3 15 + 2 11 +4 16 + 3

14 + 3 11+3 14 + 3 13 + 2

238. In the kindergarten, there were 13 small dolls and 4 big ones. How many dolls were there in total?

239. At the beginning of the year, there were 11 excellent students in the class. Then another five joined them. How many excellent students are there in the class now?

240. 1+2 5 + 3 12 + 3 14 + 3

11+2 15 + 3 13 + 213+1

3 + 3 4 + 4 15 + 2 12 + 4

13 + 3 14 + 4 16 + 3 15 + 1

241. 1+5 14 + 3 15 + 4 13+5

11+5 11+8 13 + 6 11+6

1 + 7 12 + 6 12 + 5 14 + 5

11+7 13 + 5 16 + 3 15 + 3

242. They bought 15 hammers for the school, and then they bought 3 more hammers.

Ask a question and solve the problem.

243. There were 11 paintings in the school. They bought … more paintings. How many paintings are there now?

Complete and solve the problem.

244. 11+5 17 + 2 14 + 3 15 + 4

14 + 4 13 + 4 13 + 5 12 + 7

12 + 6 11+8 11+7 12 + 3

15 + 3 12 + 5 13 + 6 14+5

245. The girl drew 15 white circles and 5 black circles. How many circles did she draw in total?

247. A student read 12 pages of a book in one day and 8 pages in another day. How many pages did he read in two days?

248. 11 boys and 9 girls were clearing the snow from the skating rink. How many children were working on the skating rink in total?

249. Create a problem where you need to add 5 to 15.

250. 14 + 6 13 + 5 14 + 6 13 + 7

12 + 5 12 + 8 12 + 3 15 + 4

11 + 9 15 + 2 16 + 2 12 + 8

17 + 2 16 + 4 17 + 3 11 + 7

251. Place 11 sticks on the left and 3 sticks on the right. How many sticks will there be in total?

Place 3 sticks on the left and 11 sticks on the right. How many sticks will there be in total?

252. 11 + 3 = 14 + 4 = 18 + 2 =

3 + 11 = 4 + 14 = 2 + 18 =

253. 1 + 15 4 + 12 1 + 19 6 + 13

6 + 11 1 + 17 4 + 16 4 + 14

5 + 15 3 + 14 5 + 13 3 + 17

254. At the beginning of winter, six students had skis. Then another 14 students bought skis. How many students now have skis?

255. Seven first-grade students initially joined the library, and then another 12 joined.

Ask a question and solve the problem.

256. Create a problem where you need to add 9 and 11.

257. 2 + 16 1 + 15 4 + 16 6 – 2 + 13

1 + 12 2 + 13 3 + 15 5 – 3 + 17

3 + 13 2 + 18 8 + 12 9 – 5 + 12

1 + 19 3 + 11 6 + 14 10 – 4 + 14

258. Count by twos up to 20.

Count by fives up to 20.

259. 13 + 6 15 + 3 4 + 11 8 – 2 + 11

11 + 7 16 + 4 7 + 13 9 – 7 + 13

12 + 4 18 + 1 5 + 12 10 – 6 + 16

17 + 3 14 + 3 3 + 14 7 – 3 + 15

260. The girl fed hens. She had 5 black hens and 11 white ones.

Ask a question and solve the problem.

261. Two teams of skiers went for a walk. One team had 12 people, and the other had 8.

Ask a question and solve the problem.

262. 7 – 5 + 10 5 – 3 + 12 8 – 6 + 18

8 – 7 + 10 8 – 2 + 11 10 – 7 + 17

9 – 6 + 10 7 – 4 + 13 7 — 2 + 13

### Increasing by several units.

263. Place 7 bones on the first wire of the abacus and the same on the second wire.

264. On the first wire, there are 5 bones, and on the second, there are the same plus 1 bone.

There is 1 more bone on the second wire than on the first.

265. Place 6 bones on the first wire and the same on the second, plus 2 more bones.

There are 2 more bones on the second wire than on the first.

266. Place 7 squares in one row and in the other row, place 2 more squares. How many squares are in the other row?

267. One student was given 4 cubes, and another student needs to be given 2 more cubes. How many cubes should be given to the other student?

268. Draw on the board 5 sticks in one row and 3 more sticks in the other row. How many sticks are in the other row?

269. Petya has 6 books, and Misha has 4 more books. How many books does Misha have?

270. In one class, there are 10 excellent students, and in another class, there are 5 more. How many excellent students are there in the other class?

271. The first number is 8, and the second is 2 more. What is the second number?

Increase the number 8 by 2. What will you get?

272. One number is 7, and the other is 1 more. What is the other number?

Increase the number 7 by 1. What will you get?

273. 10 – 1 – 4 10 + 3 1 + 10 5 + 10

10 + 8 10 + 5 4 + 10 3 + 10

10 + 6 10 + 9 6 + 10 7 + 10

274. Game. The boy says, “I have 3 sticks in one hand and 2 more in the other hand. Guess how many sticks are in the other hand.”

Play the game yourself.

275. Increase:

11 by 2 14 by 3 13 by 3

12 by 4 16 by 2 11 by 7

276. The toy boat costs 11 rubles, and the steamboat is 4 rubles more expensive. How much does the steamboat cost?

277. Mittens cost 12 rubles, and a scarf is 6 rubles more expensive. How much does the scarf cost?

278. Create a problem similar to the previous one but with different numbers.

279. The brother is 10 years old, and the sister is 3 years older than the brother. How old is the sister?

280. Create a problem similar to the previous one but with different numbers.

281. 12 + 6 14 + 4 18 + 2 15 + 5

14 + 2 16 + 2 14 + 6 13 + 6

11 + 4 15 + 1 13 + 4 18 + 2

13 + 3 12 + 3 11 + 9 14 + 5

282. Increase:

12 by 2 13 by 2 15 by 5 2 by 12

14 by 4 16 by 3 18 by 2 3 by 13

283. One hunter brought 14 squirrels from the hunt, and another brought 4 more squirrels. How many squirrels did the other hunter bring?

284. Rae is 13 years old, and her brother is 2 years older. How old is the brother?

285. Mom bought two toys for the children. One toy cost 11 rubles, and the other was 3 rubles more expensive. How much did the other toy cost?

286. 3 + 3 4 + 11 4 + 16 7 + 12

15 + 4 3 + 16 1 + 19 9 + 11

11 + 6 5 + 12 6 + 12 5 + 14

287. Increase:

13 by 5 8 by 10 3 by 11

17 by 3 4 by 12 1 by 19

288. In one box, there are 6 feathers, and in the other, there are 4 more feathers. How many feathers are in the other box?

… In one box, there are 6 feathers, and in the other, there are 10. How many feathers are there in both boxes together?

289. In one day, the children made 4 Christmas tree decorations, and the next day they made 2 more. How many decorations did they make on the second day?

… In one day, the children made 4 Christmas tree decorations, and the next day they made 6 decorations. How many decorations did they make in total?

290. 10 + 3 17 + 2 1 + 19 6 + 11

9 + 10 14 + 6 5 + 13 3 + 14

10 + 10 11 + 7 2 + 17 8 + 12

291. Increase each of the following numbers by 4:

6 10 15 11 13 16

292. Two logs were brought from the forest. The length of one log is 4 meters, and the other is 3 meters longer. What is the length of the other log?

293. Create a problem similar to the previous one but with different numbers.

294. The width of one room is 6 meters, and the other room is 3 meters wider. What is the width of the other room?

295. The height of an old house is 6 meters. The new house is 14 meters taller than the old one. What is the height of the new house?

296. Create a problem similar to the previous one but with different numbers.

297. Draw 2 plates with apples so that the second plate has 2 more apples than the first one.

298. In your notebook, circle with a pencil 2 columns of cells so that the second column has 4 more cells than the first one.

299. 6 – 5 + 18 10 – 7 + 12 10 – 4 + 13

‘ 8 – 6 + 14 9 – 4 + 13 7 – 5 + 15

5 – 2 + 13 8 – 3 + 15 8 – 6 + 17

### Subtraction of single-digit numbers without crossing over a decade.

300. 5 – 2 9 – 3 7 – 3 9 – 2 9 – 4

’ 10 + 3 10 + 6 10 + 4 10 + 7 10 + 5

301. There were 16 pencils in the box. 2 pencils were taken from it. How many pencils are left in the box?

302. 8 – 4 12 – 1 18 – 4 14 – 3

18 – 4 14 – 2 15 – 2 18 – 2

5 – 3 16 – 3 17 – 1 19 – 1

15 – 3 18 – 2 13 – 2 17 – 3

303. A carpenter needs to fix 18 chairs. He fixed 6 chairs. How many chairs does he have left to fix?

304. A painter needs to paint 16 doors. He painted 5 doors. Formulate a question and solve the problem.

305. 3 – 1 18 – 7 19 – 8 16 – 5

13 – 1 16 – 5 18 – 5 19 – 7

7 – 3 19 – 6 15 – 4 18 – 6

17 – 3 17 – 5 17 – 6 17 – 4

307. There are 18 pages in the book. The girl read 6 pages.

Formulate a question and solve the problem.

308. Olya drew 10 circles, and Lyuda drew 8 circles more. How many circles did Lyuda draw?

… Lyuda drew 18 circles and colored 6 of them. How many circles does she have left to color?

309. 6 – 3 5 – 3 14 + 3 16 + 3

‘ 16 – 3 15 – 3 14 – 3 16 – 3

9 – 4 8 – 7 15 + 4 17 + 2

19 – 4 18 – 7 15 – 4 17 – 2

310. Mom had 20 eggs. She made an omelet with 5 eggs. How many eggs are left?

312. To decorate the Christmas tree, first-grade students made 20 ornaments, with 6 made of paper and the rest made of cardboard. How many ornaments did they make from cardboard?

313. Fedya and 10ra together made 20 red stars for the holiday. Fedya made 8 stars, and 10ra made the rest.

Formulate a question and solve the problem.

314. 10-2 10-3 20-2 20-9

20-2 20-3 20-8 20-3

10-5 10-7 20-1 20-6

20-5 20-7 20-4 20-7

316. Tanya had 16 postcards. She received 4 more postcards for her birthday. How many postcards does Tanya have now?

… Tanya had 20 postcards. She gave 6 postcards for the class album. How many postcards does Tanya have left?

317. 14 + 2 8 + 11 12 + 3 17 + 3

16 + 3 4 + 16 15 – 3 20 – 3

12 + 6 2 + 17 14 + 5 12 + 8

13 + 7 5 + 13 19 – 5 20 – 8

318. In the following examples, find the one with the answer 13, then 14, 15, and so on:

13 + 5 20 – 6 19 – 3 17 – 4

3 + 12 16 + 4 2 + 17 5 + 12

319. In a pitcher, there are 10 glasses of milk, and in a canister, there are 6 more glasses. How many glasses of milk are in the canister?

… There were 16 glasses of milk in the canister. 5 glasses of milk were taken for lunch. How much milk is left in the canister?

320. 10 + 2 + 3 17 – 1 – 2 20 – 2 – 4

16 + 2 + 2 19 – 2 – 2 20 – 4 – 3

13 + 3 + 4 16 – 1 – 3 20 – 6 – 3

14 + 3 + 2 18 – 3 – 2 20 – 7 – 10

### Subtraction by several units.

321. Place 5 beans on the first wire of class counts and as many on the second wire. Then remove 1 bean from the second wire.

There are now 1 bean less on the second wire than on the first one.

322. Place 7 beans on the first wire of class counts, and on the second wire, put 2 beans less.

323. One student was given 4 pencils, and another needs to be given 1 pencil less. How many pencils will the other student receive?

324. Draw 5 circles in one row, and on the second row, draw 1 circle less. How many circles do you need to draw on the second row?

325. Place 6 squares in one row and in another row, put 2 squares less. How many squares are in the other row?

326. Petya has 8 rabbits, and Misha has 2 rabbits less. How many rabbits does Misha have?

327. Senya has 9 pigeons, and Volodya has 5 pigeons less. How many pigeons does Volodya have?

328. The first number is 8, and the second one is 3 less.

What is the second number?

329. One number is 10, and the other is 2 less. What is the other number? Subtract 2 from the number 10. What will you get?

330. 15 – 5 14 – 10 15 – 10 17 – 10

17 – 7 16 – 10 14 – 10 13 – 3

13 – 3 11 – 10 16 – 6 19 – 10

19 – 9 20 – 10 18 – 8 12 – 2

331. Game. The student says, “One card has the number 10, and the other has a number that is 3 less. Guess what number is on the other card.”

332. Which number is less than 14 by 2? less than 15 by 1? less than 18 by 4?

333. The album costs 8 rubles, and the paints are 3 rubles cheaper. How much do the paints cost?

334. The kettle costs 20 rubles, and the teapot is 5 rubles cheaper. How much does the teapot cost?

335. Create a problem similar to the previous one, but with different numbers.

336. Brother is 16 years old, and the sister is 5 years younger than the brother. How old is the sister?

337. Create a problem similar to the previous one but with different numbers.

338. 10 + 9 7 + 10 16 – 6 15 – 4

13 + 5 4 + 15 14 – 10 18 – 5

17 + 3 5 + 12 19 – 2 17 – 6

339. Mom bought 2 dolls for the children. The big doll cost 16 rubles, and the small one was 10 rubles cheaper. How much did the small doll cost?

340. Zoe is 14 years old, and Nyura is 4 years younger. How old is Nyura?

… Nyura is 10 years old, and her brother is 3 years younger. How old is her brother?

341. 17 – 10 14 – 3 14 + 3 20 – 8

14 + 4 12 + 6 7 + 12 16 – 6

18 – 2 19 – 8 20 – 3 17 – 5

16 + 3 20 – 5 16 – 5 17 – 7

342. Subtract: 6 – 2; 14 – 4; 15 – 5.

Add: 6 + 2; 14 + 4; 15 + 5.

343. Volodya has 5 colored pencils, and black ones are 3 less. How many black pencils does he have?

… Volodya has 5 colored pencils and 2 black ones. How many pencils does Volodya have in total?

344. Nina helps her mom wash the dishes. Nina washed 4 deep plates, and small plates – 2 more. How many small plates did Nina wash?

… Nina washed 4 deep plates and 6 small plates. How many plates did she wash in total?

345. 14 + 5 – 3 12 – 2 + 9 19 – 3 – 6

12 + 7 – 8 16 – 5 + 7 20 – 2 – 4

13 + 5 – 8 20 – 4 + 2 17 – 3 – 3

346. Subtract 5 from each of the following numbers:

9 15 18 20 17

347. For playing horses, Zhenya had a rope 3 m long, and Mitya had 1 m less. How long was Mitya’s rope?

348. The length of one board is 9 cm. The other board is 3 cm shorter. What is the length of the other board?

349. Create a problem similar to the previous one but with different numbers.

350. Two Christmas trees were placed in the square for the children: one – 15 m high, and the other – 3 m lower. What is the height of the second Christmas tree?

351. In front of the school, there are 2 birches: one is 16 m high, and the other is 5 m lower. What is the height of the other birch?

352. Draw 2 plates of cucumbers so that the second plate has 1 cucumber less than the first one.

353. Encircle with a pencil 2 columns of cells so that in the second column, there are 3 cells less than in the first one.

354. 10 + 8 – 3 17 – 7 + 8 18 – 10 – 8

16 + 3 – 5 16 – 5 + 4 19 – 7 – 2

11 + 9 – 6 20 – 7 + 5 20 – 3 – 4

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