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Related Facts
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Make 10
base-ten shorthand
100

44 - 32 = ?






-2 on both sides

-4 on both sides

+6 on both sides 

+ 8 on both sides

100

Write a related fact for the addition problem.

2+3=5

5-3=2 or 5-2=3

100

Count back in your head.

6-1=

6-1=5

100

17-8=

1 + 7 = 8

17 - 7 = 10

10 - 1 = 9

100

56 - 22 = ?

34

200

13 - 9 = ?

+1 on both sides

+7 on both sides

-3 on both sides 


200

Write a related fact for the addition problem.

4+3=7

7-3=4 or 7-4=3

200

Count back in your head.

9-2= 

9-2=7

200

12 - 4 = ?

2 + 2 

12 - 2 = 10

10 - 2 = 8

200

63 - 41 = ?

22

300

81 - 38 ?

- 1 on both sides

+ 2 on both sides

300

Write a related fact for the addition problem.

7 + 5= 12
12- 7=5 or 12-5=7
300

Subtract 5-3 on your number line.

2

300

16 - 9 = ?

6 + 3 

16 - 6 = 10

10 - 3 = 7

300

33 - 28 = ?

5

400

66 - 35 = ?

+ 4 on both sides

- 4 on both sides

+ 5 on both sides 

- 5 both sides

400

Write a related fact for the addition problem.

9 + 5=14

14-9=5

14-5=9

400

Subtract 17-9 using a number line.


8

400

15 - 8 = ? 

5 + 3

15 - 5 = 10

10 - 3 = 7

400

44 - 29 = ?

15

500

94 - 67 =?

+ 3 

- 4

- 7 

500

Write a related fact for the addition problem.

11 + 8=19
19-8=11

19-11=8

500

Count back in your head.

17-3=

17-3=14

500

18-9=?

8 + 1 

18 - 8 = 10 

10 - 1 = 9

500

77 - 29 = ?

48