Fact Families
Related Subtraction Fact
Solve Using a Related Addition Fact
Word Problems
Solve for the Unknown
100

4, 3, 7

4 + 3 = 7

3 + 4 = 7

7 - 3 = 4

7 - 4 = 3

100

8 + 9 =

17 - 8 =  OR

17 - 9 =

100

15 - 8= 

8 + 7 = 15

100

Christian has 20 toy vehicles. 8 are cars and the rest are trains. How many are trains?

Christian has 12 trains.

100

8 + n = 17

9

200

9, 3, 12

9 + 3 = 12

3 + 9 = 12

12 - 3 = 9

12 - 9 = 3

200

12 + 10 =

22 - 12 =    OR

22 - 10 =

200

14 - 9 = 

9 + 5 = 14

200

Over the weekend Annelise made 18 pillows. If she made 7 pillows on Saturday, how many pillows did she make on Sunday?

Annelise made 11 pillows on Sunday.

200

9 + m = 20

11

300

6, 9, 15

6 + 9 = 15

9 + 6 = 15

15 - 6 = 9

15 - 9 = 6 


300

8 + 6 =

14 - 8 =     OR

14 - 6

300

23 - 8 =

8 + 15 = 23

300

Kaitlynn made a tower with 19 blocks. Then she used 12 blocks to build another tower. How many are left in her first tower?

Kaitlynn had 7 blocks left in her first tower.

300

15 + h = 21

6

400

13, 4 , 17

13 + 4 = 17

400

7 + 9 =

16 - 9 =              OR 

16 - 7

400

21 - 10 = 

10 + 11= 21

400

Harper's teacher gave her a box of 25 pens. She gave 13 pens out to her classmates. How many pens were left in the box?

There were 12 pens left in the box.

400

13 - b = 7

6

500

13, 12, 25

13 + 12 = 25

12 + 13 = 25

25 - 13 = 12

25 - 12 = 13

500

14 + 19 =

33 - 14=       OR

33 - 19 =

500

19 - 8 = 

8 + 11 = 19

500

In the morning a grocery store had 30 apples on display. By the end of the day, there were 18 apples left. How many apples were sold during the day?

There were 12 apples sold during the day.

500

23 - b = 15

8

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