Addition / Subtraction Sentences
Mental Math using Addition
Mental Math using Subtraction
Mental Math using Doubles
Drawing Diagrams
100

Write an addition sentence.

17 - 12 = 5

___ + ___ = ___

5 + 12 =17

100

34 + 42  = ___ + ____

              = ____


34 + 42  = 70 + 6

              = 76

100

Sarah has 26 cookies. She has 15 chocolate cookies. How many vanilla cookies does she have?

Chocolate Cookies: ____

Vanilla Cookies: ____

Difference: ____

Total: ____



Chocolate Cookies: 15

Vanilla Cookies: 11

Difference: 4

Total: 26

100

Double the smaller number and then add 1.

15 + 14 = 14 + ___ + ___ = ___

15 + 14 = 14 + 14 + 1 = 29

100

Draw a picture.

3 white squares. 5 more black squares than white squares.

Difference: ____

Total: ____

Difference: 5

Total: 11

200

Write an addition sentence.

64 - 29 = 35

___ + ___ = ___

35 + 29 = 64

200

42 = ___ + ____

22 = ___ + ____

42 + 22 = ___ + ___

             = ____

42 = 40 + 2

22 = 20 + 2

42 + 22 = 60 + 4

             = 64

200

Subtract mentally by counting up. Fill in the blanks then add up the numbers for the answer.

SOLVE: 63 - 18 

18 ___ 20 ___ 60 ___ 63

Answer: ___ + ___ + ___ = ____

63 - 18 = 45

2 + 40 + 3 = 45

200

Double the smaller number and then add 1.

12 + 13 = 12 + ___ + ___ = ___

12 + 13 = 12 + 12 + 1 = 25

200

Draw a picture.

2 red squares. 8 squares all together 

Difference: ____

Total: ____

Difference: 4

Total: 8

300

Write an addition sentence.

72 - 37 = 35

___ + ___ = ___

35 + 37 = 72

300

20 + 6 = 20 + ___ + ___ =___

20 + 6 = 20 + 5 + 1 =26

300

Subtract mentally by counting up. Fill in the blanks then add up the numbers for the answer.

SOLVE: 23 - 6 

6 ___ 10 ___ 20 ___ 23

Answer: ___ + ___ + ___ = ____


23 - 6 = 17

4 + 10 + 3 = 17

300

Double the bigger number and then minus 1.

30 + 29 = 30 + ___ - ___ = ___

30 + 29 = 30 + 30 - 1 = 59

300

Draw a picture.

6 purple squares. 9 squares altogether. 

Difference: ____

Total: ____

Difference: 3

Total: 9

400

Write a subtraction sentence.

86 + 23 = 109

___ - ___ = ___

109 - 23 = 86

400

76 + 7 = 76 + ___ + ___= ____

76 + 7 = 76 + 4 + 3 = 83

400

30 - 8 = 30 - ___ - ____ = ____

30 - 8 = 30 - 4 - 4 = 22

400

Double the bigger number and then minus 1.

18 + 17 = ___ + ___ - ___ = ___

18 + 17 = 18 + 18 - 1 = 35

400

Draw a picture.

9 blue squares. 3 fewer red squares than blue squares.

Difference: ____

Total: ____

Difference: 3

Total: 15

500

Write a subtraction sentence.

502 + 403 = 905

___ - ___ = ___

905 - 403 = 502

500

86 + 6 = 86 + ___ + ____ = ____

86 + 6 = 86 + 4 + 2 = 92

500

40 - 6 = 40 - ___ - ____ = ____

40 - 6 = 40 - 3 - 3 = 34        

500

Double the bigger number and then minus 1.

75 + 74 = ___ + ___ - ___ = ___

75 + 74 = 75 + 75 - 1 = 149 

500

Draw a picture.

6 green squares. 4 fewer yellow squares than green squares.

Difference: ____

Total: ____

Difference: 4

Total: 8

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