Subtraction within 20

Fact Families

100

What equation is missing from the fact family?

5+6=11

11-6=5

11-5=6

6+5=11

200

What equation is missing from the fact family?

8+7=15

7+8=15

15-8=7

15-7=8

300

What equation is missing from the fact family?

13= 7+6

13=6+7

7= 13-6

6=13-7

400

What equations is missing from the fact family?

5+9=14

14-5=9

9+5=14

14-9=5

500

What equations is missing from the fact family?

9+7=16

16-9=7

7+9=16

16-7=9

-9

100

19-9=

10

200

10-9=

1

300

18-9=

9

400

15-9=

6

500

20-9=

11

-5

100

10-5=

5

200

13-5=

8

300

15-5=

10

400

14-5=

9

500

20-5=

15

Story Problems

100

Sally had 12 blocks. She gave 4 away. How many blocks does she have left?

12-4= 8 blocks

200

Alec has 13 balls. He gives 3 balls to Cameron. How many balls does he have left?

13-3= 10 balls

300

Ms. L started with 15 crayons. She lost some and now has 11 crayons. How many did she loose?

15-11= 5 crayons lost

or 11+ 5= 15

400

Jackson had 18 jacks. He gave 9 jacks away. How many jacks does he have left?

18-9=9

500

Madisyn had 17 dolls. She gave some dolls to her sister and now has 8 dolls. How many dolls did she give to her sister?

 

17-8=9 dolls she gave away