Addition Patterns & Strategies

12

13

14

15

17

18

19

20

I know that 6 + 6 = 12, so I just need to add 1 more.

I know that 6 + 6 = 12, so I just need to subtract 1 from 12.

I know that 6 + 6 = 12, so I just need to add 7 more.

I know that 6 + 6 = 12, So I just need to subtract 7 from 12.

13

14

17

15

5

6

7

8

sometimes be even and sometimes be odd

always be odd

always be even

never be even

sometimes be even and sometimes be odd

always be even

always be odd

never be odd

12

20

14

16

17

8

25

9

I know that 9 + 9 = 18, so I just need to add one more.

I know that 8 + 8 = 16, so I just need to subtract 1 from 16.

I know that 8 + 8 = 16, so I just need to add 1 more.