Topic 4

Fact Families

100

What is the missing fact in this fact family?

8 + 2 = 10

2 + 8 = 10

10 - 2 = 8

10 - 8 = 2

200

Name one addition fact related to this subtraction fact.

16 - 7 = 9

9 + 7 = 16 or 7 +  9 = 16

300

Name one subtraction fact related to this addition fact:

5 + 6 = 11

11 - 6 = 5 or 11 - 5 = 6

Subtraction Facts

100

9 - 6 = ?

3

200

20 - 10 = ?

10

300

13 - ? = 7

6

Addition Facts

100

9 + 9 = ?

18

200

7 + ? = 15

8

300

? + 0 = 7

7

Word Problems

100

There are 13 birds in a tree. Then 9 birds fly away. How many are still in the tree?

4 birds

200

Nina bakes 14 corn muffins. She gives 8 away. There are 6 left. Which equation matches the story?

A) 15 - 8 = 7

B) 7 + 8 = 15

C) 14 - 8 = 6

D) 8 + 6 = 14

C) 14 - 8 = 6

300

A box has 16 skateboard parts. Maria used some of the parts. Now there are 7 parts left. How many parts did Maria use?

16 - 7 = 9 parts