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Addition and Subtraction to 20

English 30 Public

Number line

Study Slideshow

19-3

16

15

11-9

2

15

20-9

11

15

12+5

17

15

9+5

14

15

20-10

10

15

8+7

15

15

18-13

5

15

16-8

8

15

18-3

15

15

17-6

11

15

12+4

16

15

12-11

1

15

13-6

7

15

14-3

11

15

12+3

15

15

1
2
›