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First grade math addition and subtraction problems (mixed problems), printable worksheets in pdf

Numbers from 1 to 10.

Count the objects and solve the problems. Write the answers.
1. How many clocks are left?

2. Find the sum

3. Find the sum

4. Find the difference.

5. Find the sum.

6. Find the number of the apples.

7. Find the number of the motorbikes.

8. Find the number of the birds.

9. Numerate the objects begininng from 1.

Add and subtract numbers up to 10

1. Solve the problems on addition.

 3 + 7 = 8 + 2 = 4 + 4 = 8 + 2 = 9 + 0 = 5 + 5 = 3 + 2 = 2 + 1 = 9 + 1 = 1 + 8 = 2 + 4 = 1 + 7 = 0 + 3 = 3 + 7 = 4 + 4 = 9 + 1 = 10 + 0 = 4 + 4 = 0 + 4 = 8 + 1 = 10 + 0 = 2 + 4 = 8 + 0 = 1 + 1 = 7 + 0 = 9 + 1 = 7 + 1 = 8 + 2 = 5 + 2 = 6 + 3 = 3 + 4 = 10 + 0 = 1 + 1 = 5 + 5 = 5 + 0 = 1 + 1 = 3 + 0 = 6 + 0 = 7 + 2 = 0 + 8 = 10 + 0 = 7 + 0 = 7 + 2 = 6 + 2 = 5 + 1 = 8 + 0 = 2 + 4 = 4 + 6 = 9 + 1 = 4 + 0 = 9 + 0 = 7 + 1 = 6 + 1 = 0 + 7 = 5 + 1 = 6 + 3 = 4 + 5 = 7 + 0 = 8 + 1 = 9 + 0 = 1 + 4 = 0 + 4 = 7 + 3 = 9 + 1 = 6 + 0 = 8 + 2 = 6 + 4 = 9 + 1 = 2 + 7 =

2. Subtract.

 6 - 6 = 3 - 1 = 5 - 5 = 4 - 3 = 5 - 5 = 5 - 1 = 1 - 1 = 3 - 1 = 3 - 1 = 8 - 4 = 9 - 2 = 2 - 1 = 9 - 5 = 6 - 4 = 10 - 10 = 3 - 3 = 2 - 1 = 8 - 1 = 5 - 1 = 8 - 3 = 5 - 4 = 4 - 4 = 3 - 3 = 5 - 2 = 10 - 3 = 10 - 7 = 5 - 3 = 6 - 1 = 4 - 2 = 4 - 2 = 8 - 5 = 1 - 1 = 1 - 1 = 1 - 1 = 7 - 4 = 1 - 1 = 1 - 1 = 10 - 2 = 1 - 1 = 2 - 2 = 9 - 9 = 9 - 7 = 6 - 3 = 7 - 5 = 6 - 5 = 8 - 5 = 2 - 2 = 3 - 1 = 8 - 6 = 10 - 8 = 6 - 5 = 1 - 1 = 6 - 4 = 5 - 2 = 1 - 1 = 4 - 4 = 4 - 2 = 2 - 2 = 8 - 2 = 4 - 4 = 9 - 4 = 2 - 2 = 10 - 2 = 4 - 3 = 4 - 4 = 8 - 1 = 7 - 7 = 1 - 1 = 9 - 9 = 2 - 1 = 3 - 1 = 5 - 3 = 1 - 1 = 6 - 1 = 7 - 2 = 5 - 2 = 9 - 7 = 4 - 4 = 1 - 1 = 4 - 3 = 6 - 2 = 9 - 6 = 8 - 1 = 1 - 1 = 4 - 3 = 7 - 4 = 5 - 1 = 5 - 4 = 4 - 1 = 8 - 6 = 4 - 1 = 1 - 1 = 8 - 6 =

3. Add or subtract (part 1)

 8 + 0 = 1 - 0 = 5 - 4 = 3 - 3 = 5 - 5 = 9 + 1 = 3 + 4 = 1 + 7 = 8 + 0 = 7 - 0 = 3 - 1 = 0 - 0 = 10 - 7 = 1 + 7 = 4 + 0 = 7 + 1 = 6 + 4 = 9 + 0 = 10 + 0 = 0 - 0 = 2 - 1 = 1 - 1 = 2 + 7 = 3 + 0 = 4 + 1 = 9 + 0 = 5 + 2 = 8 - 3 = 3 - 1 = 1 - 0 = 8 + 1 = 4 + 3 = 6 + 4 = 8 - 4 = 3 - 1 = 0 - 0 = 7 + 0 = 5 - 4 = 2 + 1 = 2 + 0 = 3 - 1 = 1 - 1 = 6 - 0 = 10 - 3 = 4 + 6 = 6 + 3 = 1 + 2 = 10 + 0 = 5 - 4 = 9 - 6 = 1 - 1 = 9 - 7 = 5 + 4 = 1 + 8 = 4 + 0 = 1 + 7 = 4 + 2 = 0 + 7 = 5 - 3 = 0 - 0 = 2 - 2 = 9 + 0 = 4 + 5 = 1 + 1 = 3 + 3 = 5 + 0 = 8 - 5 = 7 - 4 = 6 - 1 = 3 + 0 = 8 + 0 = 5 + 0 = 1 - 0 = 7 - 5 = 7 - 5 = 2 + 5 = 0 - 0 = 9 + 0 = 8 - 5 = 7 - 0 = 4 - 4 = 6 + 3 = 8 + 1 = 10 + 0 = 9 - 0 = 2 - 2 = 5 - 0 = 1 + 7 = 7 - 0 = 9 + 1 = 9 + 0 = 0 - 0 = 0 + 0 = 0 - 0 = 10 - 8 = 0 - 0 = 1 + 5 = 4 + 1 = 5 + 1 = 0 - 0 = 10 - 3 = 5 - 2 = 8 + 0 = 9 - 3 = 2 + 2 =

4. Add or subtract (part 2).

 4 + 1 = 9 - 5 = 4 - 2 = 0 - 0 = 2 - 2 = 7 + 2 = 0 + 9 = 2 + 8 = 10 + 0 = 8 - 1 = 4 - 2 = 3 - 2 = 10 - 7 = 1 + 2 = 0 + 7 = 7 + 2 = 3 + 5 = 0 + 2 = 0 + 4 = 6 - 6 = 10 - 4 = 6 - 1 = 7 + 3 = 5 + 0 = 6 + 0 = 7 + 1 = 4 + 5 = 9 - 7 = 6 - 2 = 4 - 3 = 10 + 0 = 0 + 7 = 10 + 0 = 6 - 3 = 4 - 3 = 7 - 1 = 7 + 3 = 8 - 5 = 1 + 6 = 10 + 0 = 0 - 0 = 1 - 1 = 4 - 4 = 10 - 2 = 0 + 0 = 2 + 8 = 10 + 0 = 7 + 1 = 7 - 6 = 8 - 2 = 0 - 0 = 9 - 2 = 2 + 3 = 6 + 1 = 0 + 10 = 6 + 2 = 6 + 0 = 4 + 1 = 2 - 2 = 5 - 2 = 5 - 4 = 0 + 8 = 1 + 9 = 8 + 0 = 10 + 0 = 6 + 2 = 5 - 0 = 10 - 3 = 6 - 1 = 1 + 1 = 6 + 1 = 6 + 2 = 9 - 7 = 7 - 2 = 3 - 2 = 5 + 3 = 4 - 1 = 9 + 1 = 10 - 0 = 6 - 6 = 3 - 0 = 4 + 1 = 7 + 2 = 6 + 0 = 9 - 3 = 4 - 3 = 9 - 8 = 7 + 1 = 8 - 2 = 9 + 0 =

Add and subtract numbers up to 20

 16 + 4 = 13 + 4 = 3 + 9 = 5 + 7 = 0 + 11 = 3 + 14 = 6 + 4 = 17 + 2 = 6 + 12 = 20 + 0 = 9 + 10 = 8 + 0 = 8 + 12 = 3 + 1 = 11 + 2 = 16 + 1 = 1 + 13 = 20 + 0 = 17 + 0 = 6 + 14 = 19 + 1 = 19 + 0 = 6 + 3 = 17 + 2 = 2 + 15 = 18 + 1 = 9 + 1 = 19 + 1 = 17 + 1 = 20 + 0 = 14 + 6 = 11 + 0 = 19 + 1 = 20 + 0 = 18 + 1 = 15 + 1 = 2 + 14 = 2 + 3 = 17 + 0 = 13 + 3 = 16 + 4 = 4 + 13 = 10 + 9 = 8 + 6 = 20 + 0 = 13 + 4 = 10 + 4 = 5 + 7 = 8 + 8 = 20 + 0 = 11 + 9 = 6 + 2 = 0 + 8 = 9 + 11 = 6 + 13 = 1 + 5 = 14 + 3 = 1 + 2 = 10 + 6 = 1 + 7 = 15 + 1 = 1 + 9 = 15 + 2 = 9 + 8 = 8 + 4 = 2 + 17 = 20 + 0 = 1 + 19 = 12 + 0 = 20 + 0 = 18 + 1 = 12 + 5 = 6 + 13 = 16 + 3 = 5 + 3 = 8 + 6 = 4 + 12 = 0 + 20 = 10 + 5 = 0 + 9 = 20 + 0 = 15 + 2 = 15 + 1 = 19 + 0 = 12 + 1 = 4 + 1 = 19 + 0 = 11 + 8 = 8 + 4 = 12 + 4 = 0 + 11 = 9 + 1 = 18 + 1 =

2. Subtract.

 20 - 19 = 3 - 3 = 10 - 10 = 2 - 0 = 6 - 1 = 1 - 1 = 12 - 7 = 16 - 0 = 1 - 0 = 18 - 12 = 14 - 6 = 0 - 0 = 8 - 2 = 18 - 8 = 8 - 3 = 18 - 17 = 4 - 0 = 18 - 14 = 7 - 1 = 0 - 0 = 16 - 0 = 12 - 2 = 20 - 8 = 19 - 19 = 15 - 4 = 19 - 5 = 8 - 1 = 14 - 1 = 14 - 6 = 16 - 6 = 12 - 8 = 7 - 4 = 16 - 6 = 13 - 9 = 8 - 6 = 1 - 1 = 17 - 14 = 20 - 12 = 16 - 6 = 6 - 0 = 15 - 5 = 19 - 8 = 18 - 3 = 7 - 1 = 2 - 2 = 12 - 8 = 12 - 3 = 5 - 0 = 1 - 0 = 5 - 0 = 4 - 2 = 1 - 1 = 4 - 2 = 3 - 2 = 1 - 0 = 4 - 3 = 3 - 3 = 8 - 3 = 9 - 9 = 8 - 8 = 4 - 3 = 7 - 7 = 1 - 1 = 14 - 4 = 15 - 10 = 9 - 2 = 5 - 2 = 15 - 7 = 1 - 0 = 16 - 16 = 7 - 5 = 12 - 12 = 5 - 2 = 3 - 1 = 20 - 0 = 0 - 0 = 7 - 2 = 10 - 6 = 16 - 11 = 15 - 7 = 7 - 5 = 17 - 15 = 10 - 9 = 15 - 8 = 0 - 0 = 5 - 0 = 6 - 5 = 8 - 5 = 5 - 2 = 2 - 2 = 6 - 6 = 20 - 0 = 10 - 3 =

3. Add or subtract (part 1).

 16 + 3 = 5 - 3 = 14 - 13 = 1 - 1 = 15 - 7 = 7 + 0 = 3 + 17 = 12 + 3 = 17 + 2 = 15 - 13 = 9 - 8 = 17 - 6 = 17 - 1 = 15 + 3 = 14 + 2 = 4 + 7 = 0 + 3 = 10 + 1 = 16 + 4 = 20 - 15 = 3 - 3 = 9 - 5 = 6 + 1 = 11 + 2 = 20 + 0 = 5 + 5 = 12 + 7 = 2 - 0 = 9 - 7 = 17 - 6 = 1 + 6 = 2 + 2 = 20 + 0 = 19 - 10 = 12 - 5 = 3 - 2 = 6 + 8 = 17 - 11 = 4 + 0 = 6 + 1 = 12 - 11 = 8 - 0 = 19 - 15 = 3 - 0 = 12 + 4 = 5 + 14 = 4 + 4 = 15 + 1 = 7 - 3 = 11 - 2 = 7 - 3 = 1 - 0 = 13 + 5 = 11 + 5 = 10 + 6 = 6 + 10 = 3 + 15 = 13 + 4 = 16 - 10 = 4 - 1 = 7 - 4 = 3 + 3 = 14 + 5 = 9 + 10 = 8 + 8 = 20 + 0 = 7 - 6 = 13 - 5 = 15 - 15 = 15 + 4 = 12 + 7 = 20 + 0 = 0 - 0 = 7 - 3 = 19 - 7 = 1 + 6 = 10 - 1 = 2 + 16 = 11 - 7 = 16 - 8 = 18 - 5 = 0 + 8 = 0 + 19 = 16 + 1 = 19 - 2 = 16 - 1 = 3 - 3 = 1 + 16 = 2 - 0 = 5 + 10 = 16 + 1 = 9 - 7 = 7 + 0 = 2 - 0 = 10 - 6 = 14 - 12 =

4. Add or subtract (part 2).

 9 + 0 = 1 - 0 = 14 - 14 = 19 - 4 = 0 - 0 = 17 + 3 = 0 + 1 = 10 + 5 = 13 + 1 = 15 - 5 = 2 - 0 = 1 - 0 = 3 - 3 = 13 + 1 = 1 + 0 = 1 + 19 = 13 + 7 = 15 + 2 = 9 + 6 = 4 - 1 = 13 - 10 = 14 - 2 = 11 + 3 = 1 + 6 = 15 + 2 = 18 + 0 = 17 + 3 = 10 - 7 = 10 - 0 = 1 - 0 = 16 + 3 = 6 + 11 = 14 + 5 = 3 - 1 = 15 - 3 = 3 - 1 = 19 + 1 = 1 - 1 = 0 + 5 = 18 + 2 = 5 - 2 = 5 - 5 = 7 - 3 = 17 - 11 = 18 + 2 = 6 + 3 = 3 + 14 = 14 + 1 = 10 - 8 = 16 - 5 = 10 - 5 = 20 - 4 = 18 + 0 = 14 + 5 = 8 + 12 = 13 + 0 = 20 + 0 = 17 + 3 = 5 - 5 = 15 - 11 = 20 - 8 = 9 + 0 = 1 + 11 = 6 + 4 = 19 + 0 = 13 + 2 = 11 - 1 = 1 - 0 = 8 - 5 = 18 + 0 = 3 + 6 = 13 + 2 = 1 - 0 = 12 - 11 = 20 - 0 = 11 + 4 = 6 - 6 = 6 + 4 = 13 - 2 = 13 - 2 = 17 - 4 = 1 + 2 = 8 + 3 = 5 + 4 = 16 - 5 = 16 - 11 = 7 - 3 = 12 + 2 = 4 - 2 = 10 + 4 = 14 + 4 = 14 - 2 = 20 + 0 =

Add and subtract numbers up to 50

 5 + 8 = 49 + 0 = 30 + 7 = 28 + 10 = 23 + 3 = 18 + 23 = 47 + 0 = 10 + 26 = 19 + 1 = 38 + 3 = 20 + 26 = 33 + 12 = 41 + 8 = 22 + 1 = 15 + 10 = 13 + 13 = 21 + 5 = 32 + 6 = 17 + 21 = 38 + 2 = 38 + 11 = 26 + 9 = 2 + 42 = 45 + 1 = 50 + 0 = 19 + 15 = 32 + 5 = 21 + 9 = 34 + 8 = 22 + 28 = 25 + 5 = 9 + 15 = 11 + 33 = 34 + 15 = 40 + 6 = 35 + 14 = 25 + 4 = 8 + 29 = 43 + 2 = 1 + 45 = 31 + 3 = 38 + 6 = 26 + 4 = 24 + 22 = 21 + 5 = 3 + 43 = 48 + 0 = 17 + 29 = 29 + 5 = 44 + 6 = 29 + 21 = 48 + 2 = 12 + 12 = 30 + 3 = 12 + 37 = 36 + 0 = 38 + 3 = 30 + 0 = 3 + 2 = 42 + 7 = 23 + 17 = 16 + 15 = 24 + 15 = 37 + 9 = 25 + 8 = 23 + 3 = 27 + 8 = 48 + 1 = 19 + 18 = 45 + 4 = 1 + 15 = 12 + 3 = 21 + 5 = 2 + 39 = 39 + 3 = 36 + 11 = 8 + 24 = 38 + 6 = 5 + 8 = 26 + 19 = 4 + 42 = 17 + 6 = 50 + 0 = 9 + 3 = 33 + 3 = 27 + 0 = 31 + 12 = 39 + 6 = 1 + 48 = 8 + 25 = 29 + 18 = 39 + 6 = 16 + 20 =

2. Subtractа.

 26 - 10 = 22 - 21 = 21 - 4 = 19 - 19 = 30 - 13 = 33 - 13 = 3 - 1 = 39 - 27 = 25 - 18 = 50 - 38 = 13 - 3 = 43 - 23 = 15 - 8 = 7 - 3 = 37 - 36 = 13 - 8 = 40 - 18 = 23 - 16 = 47 - 20 = 35 - 34 = 49 - 17 = 7 - 5 = 27 - 9 = 15 - 4 = 5 - 5 = 18 - 14 = 26 - 12 = 10 - 9 = 18 - 13 = 12 - 1 = 38 - 35 = 46 - 29 = 38 - 28 = 43 - 30 = 50 - 35 = 35 - 26 = 47 - 2 = 8 - 2 = 10 - 9 = 21 - 3 = 24 - 15 = 4 - 0 = 42 - 34 = 21 - 8 = 16 - 7 = 42 - 32 = 17 - 15 = 25 - 19 = 7 - 2 = 20 - 17 = 28 - 6 = 14 - 0 = 6 - 3 = 0 - 0 = 40 - 15 = 42 - 38 = 27 - 0 = 44 - 6 = 42 - 41 = 50 - 38 = 1 - 0 = 37 - 31 = 13 - 5 = 3 - 3 = 42 - 1 = 47 - 8 = 31 - 7 = 5 - 1 = 19 - 4 = 50 - 28 = 19 - 18 = 14 - 14 = 7 - 7 = 12 - 10 = 28 - 15 = 38 - 26 = 43 - 20 = 4 - 1 = 32 - 19 = 34 - 18 = 39 - 36 = 19 - 8 = 3 - 3 = 27 - 7 = 4 - 4 = 33 - 16 = 32 - 25 = 16 - 14 = 40 - 21 = 38 - 27 = 3 - 1 = 13 - 13 = 25 - 6 =

3. Add or subtract (part 1).

 1 + 31 = 11 - 2 = 1 - 1 = 27 - 20 = 12 - 1 = 2 + 6 = 2 + 44 = 40 + 10 = 23 + 15 = 47 - 6 = 29 - 21 = 35 - 1 = 12 - 2 = 17 + 18 = 21 + 1 = 47 + 0 = 29 + 19 = 30 + 14 = 25 + 10 = 32 - 8 = 12 - 10 = 35 - 7 = 49 + 1 = 46 + 1 = 49 + 0 = 36 + 11 = 34 + 7 = 12 - 10 = 25 - 11 = 0 - 0 = 38 + 2 = 14 + 27 = 43 + 3 = 24 - 21 = 32 - 7 = 42 - 0 = 6 + 4 = 5 - 0 = 2 + 5 = 44 + 5 = 48 - 4 = 31 - 27 = 11 - 8 = 3 - 1 = 17 + 22 = 41 + 0 = 24 + 26 = 2 + 41 = 25 - 16 = 14 - 10 = 48 - 24 = 11 - 0 = 46 + 4 = 12 + 18 = 26 + 24 = 38 + 0 = 23 + 8 = 41 + 9 = 40 - 30 = 17 - 17 = 36 - 29 = 16 + 3 = 45 + 1 = 42 + 8 = 10 + 27 = 3 + 41 = 14 - 3 = 50 - 5 = 37 - 30 = 29 + 10 = 27 + 21 = 45 + 2 = 14 - 6 = 20 - 5 = 29 - 12 = 18 + 31 = 23 - 2 = 47 + 1 = 43 - 10 = 1 - 1 = 13 - 12 = 40 + 0 = 2 + 34 = 38 + 1 = 42 - 42 = 25 - 0 = 19 - 5 = 5 + 12 = 9 - 6 = 1 + 4 = 24 - 11 = 39 - 23 = 5 - 2 = 18 + 9 = 6 - 6 = 14 + 30 =

4. Add or subtract (part 2).

 33 + 13 = 22 - 2 = 38 - 2 = 36 - 20 = 33 - 5 = 23 + 4 = 44 + 3 = 22 + 2 = 16 + 15 = 22 - 10 = 38 - 38 = 22 - 14 = 27 - 0 = 20 + 9 = 43 + 6 = 8 + 25 = 35 + 7 = 28 + 2 = 12 + 6 = 44 - 15 = 34 - 14 = 39 - 5 = 33 + 1 = 42 + 0 = 37 + 1 = 2 + 18 = 6 + 39 = 1 - 0 = 33 - 23 = 31 - 21 = 39 + 5 = 17 + 30 = 50 + 0 = 23 - 12 = 3 - 3 = 49 - 34 = 21 + 10 = 19 - 9 = 25 + 19 = 23 + 26 = 12 - 6 = 38 - 5 = 33 - 10 = 49 - 18 = 30 + 12 = 38 + 3 = 33 + 10 = 43 + 0 = 3 - 0 = 19 - 4 = 46 - 9 = 48 - 29 = 6 + 28 = 15 + 17 = 24 + 13 = 36 + 9 = 19 + 24 = 35 + 2 = 30 - 6 = 12 - 6 = 21 - 11 = 2 + 8 = 20 + 4 = 39 + 0 = 2 + 43 = 28 + 22 = 38 - 14 = 29 - 29 = 18 - 3 = 36 + 9 = 35 + 15 = 4 + 13 = 17 - 15 = 5 - 2 = 3 - 2 = 22 + 8 = 41 - 16 = 28 + 12 = 19 - 5 = 22 - 13 = 20 - 11 = 23 + 23 = 0 + 13 = 27 + 14 = 22 - 14 = 35 - 5 = 42 - 16 = 21 + 23 = 21 - 3 = 31 + 7 = 41 - 7 = 25 - 19 = 46 - 24 = 36 + 14 = 10 - 7 = 7 + 35 = 29 - 18 = 4 - 3 = 8 - 6 = 34 + 2 = 10 - 10 = 50 + 0 =

Add and subtract numbers up to 100

 49 + 22 = 45 + 25 = 56 + 14 = 61 + 15 = 80 + 12 = 63 + 4 = 51 + 38 = 44 + 18 = 57 + 16 = 2 + 0 = 90 + 10 = 73 + 23 = 93 + 0 = 78 + 6 = 80 + 0 = 36 + 4 = 35 + 47 = 21 + 62 = 99 + 1 = 99 + 1 = 10 + 76 = 52 + 1 = 72 + 13 = 97 + 2 = 24 + 23 = 96 + 0 = 76 + 24 = 12 + 81 = 34 + 9 = 96 + 4 = 95 + 4 = 21 + 74 = 33 + 9 = 65 + 9 = 70 + 23 = 89 + 5 = 95 + 5 = 30 + 20 = 98 + 1 = 87 + 0 = 56 + 20 = 32 + 65 = 81 + 7 = 27 + 55 = 55 + 18 = 94 + 6 = 57 + 29 = 67 + 17 = 64 + 34 = 90 + 10 = 50 + 18 = 96 + 0 = 11 + 54 = 77 + 20 = 71 + 29 = 6 + 0 = 66 + 17 = 33 + 6 = 91 + 1 = 14 + 36 = 90 + 5 = 23 + 59 = 92 + 0 = 82 + 8 = 95 + 0 = 11 + 30 = 40 + 55 = 90 + 0 = 71 + 3 = 80 + 15 = 99 + 1 = 47 + 4 = 58 + 37 = 8 + 7 = 17 + 56 = 42 + 42 = 51 + 44 = 39 + 25 = 41 + 12 = 77 + 23 = 76 + 11 = 77 + 8 = 4 + 24 = 95 + 2 = 11 + 63 = 14 + 53 = 80 + 8 = 2 + 66 = 95 + 5 = 62 + 32 = 97 + 1 = 77 + 1 = 71 + 8 = 71 + 28 = 38 + 23 = 52 + 44 =

2. Subtract.

 77 - 43 = 33 - 22 = 84 - 81 = 66 - 4 = 50 - 47 = 39 - 33 = 96 - 30 = 95 - 30 = 9 - 6 = 31 - 20 = 10 - 7 = 77 - 67 = 74 - 48 = 73 - 4 = 72 - 35 = 58 - 20 = 3 - 1 = 74 - 61 = 25 - 8 = 55 - 28 = 33 - 20 = 82 - 67 = 92 - 16 = 45 - 19 = 63 - 17 = 25 - 21 = 55 - 48 = 35 - 16 = 26 - 14 = 88 - 35 = 42 - 41 = 48 - 10 = 25 - 12 = 88 - 58 = 98 - 58 = 28 - 10 = 48 - 32 = 25 - 21 = 67 - 38 = 15 - 14 = 95 - 43 = 73 - 15 = 67 - 4 = 13 - 11 = 35 - 26 = 52 - 1 = 81 - 70 = 25 - 9 = 11 - 10 = 52 - 27 = 47 - 14 = 11 - 6 = 25 - 25 = 73 - 58 = 32 - 21 = 48 - 21 = 13 - 4 = 16 - 15 = 10 - 2 = 83 - 51 = 49 - 22 = 79 - 21 = 45 - 44 = 85 - 58 = 0 - 0 = 67 - 9 = 71 - 11 = 98 - 21 = 88 - 45 = 17 - 2 = 70 - 4 = 24 - 6 = 24 - 18 = 88 - 87 = 47 - 33 = 97 - 85 = 24 - 4 = 86 - 44 = 60 - 14 = 47 - 24 = 64 - 25 = 46 - 5 = 81 - 21 = 18 - 18 = 55 - 38 = 60 - 25 = 52 - 4 = 65 - 22 = 53 - 29 = 8 - 5 = 43 - 21 = 9 - 9 = 71 - 2 =

3. Add or subtract (part 1).

 92 + 8 = 23 - 18 = 26 - 2 = 51 - 7 = 28 - 3 = 92 + 5 = 55 + 8 = 10 + 52 = 38 + 23 = 23 - 10 = 98 - 75 = 28 - 20 = 3 - 2 = 21 + 21 = 74 + 17 = 0 + 65 = 84 + 13 = 16 + 57 = 62 + 34 = 40 - 7 = 80 - 71 = 17 - 2 = 89 + 2 = 77 + 10 = 80 + 1 = 87 + 10 = 32 + 57 = 10 - 6 = 90 - 51 = 99 - 91 = 19 + 37 = 94 + 1 = 33 + 1 = 28 - 26 = 40 - 18 = 28 - 26 = 60 + 26 = 90 - 10 = 36 + 54 = 77 + 11 = 96 - 51 = 83 - 58 = 89 - 31 = 96 - 38 = 93 + 0 = 86 + 4 = 31 + 32 = 67 + 12 = 21 - 14 = 80 - 57 = 90 - 83 = 89 - 25 = 52 + 35 = 69 + 4 = 51 + 20 = 91 + 8 = 32 + 62 = 56 + 11 = 46 - 22 = 67 - 17 = 12 - 10 = 50 + 38 = 71 + 5 = 0 + 20 = 60 + 6 = 12 + 45 = 63 - 18 = 4 - 1 = 62 - 20 = 57 + 12 = 49 + 42 = 88 + 11 = 12 - 6 = 6 - 6 = 35 - 6 = 61 + 16 = 11 - 9 = 61 + 11 = 5 - 3 = 62 - 59 = 81 - 11 = 30 + 0 = 86 + 8 = 28 + 14 = 16 - 8 = 77 - 51 = 11 - 8 = 60 + 22 = 52 - 43 = 39 + 41 = 73 - 23 = 6 - 1 = 81 - 41 = 70 + 7 = 79 - 3 = 5 + 5 =

4. Add or subtract (part 2).

 10 + 76 = 51 - 36 = 25 - 10 = 20 - 16 = 99 - 60 = 2 + 60 = 28 + 46 = 36 + 54 = 49 + 19 = 68 - 67 = 79 - 51 = 62 - 10 = 16 - 10 = 1 + 3 = 20 + 37 = 55 + 9 = 15 + 5 = 75 + 23 = 91 + 9 = 64 - 7 = 42 - 0 = 98 - 5 = 39 + 50 = 18 + 18 = 81 + 15 = 92 + 3 = 54 + 10 = 30 - 22 = 14 - 12 = 97 - 48 = 53 + 22 = 36 + 33 = 93 + 5 = 66 - 13 = 69 - 37 = 91 - 32 = 55 + 27 = 11 - 9 = 91 + 8 = 79 + 4 = 90 - 0 = 94 - 32 = 17 - 5 = 47 - 16 = 59 + 13 = 9 + 56 = 19 + 66 = 90 + 10 = 0 - 0 = 72 - 56 = 53 - 40 = 59 - 17 = 92 + 3 = 64 + 34 = 98 + 1 = 74 + 26 = 93 + 4 = 85 + 6 = 43 - 15 = 0 - 0 = 49 - 18 = 100 + 0 = 92 + 2 = 58 + 12 = 71 + 9 = 12 + 29 = 43 - 21 = 12 - 0 = 57 - 55 = 29 + 3 = 0 + 92 = 84 + 0 = 54 - 27 = 71 - 21 = 3 - 0 = 69 + 27 = 98 - 67 = 48 + 25 = 39 - 18 = 61 - 21 = 54 - 44 = 22 + 74 = 84 + 2 = 37 + 13 = 17 - 14 = 35 - 23 = 18 - 3 = 57 + 22 = 14 - 5 = 41 + 54 = 6 - 1 = 41 - 13 = 92 - 52 = 12 + 35 = 28 - 10 = 60 + 0 =

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