Addition Patterns & Strategies

7 + 7 =

• 12

• 13

• 14

• 15

9 + 9 =

• 17

• 18

• 19

• 20

How can you use the doubles fact 6 + 6 to solve 6 + 7 ?

• 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.

7 + 8 = ?

• 13

• 14

• 17

• 15

What number do you need to add to 4 to make 10?

• 5

• 6

• 7

• 8

When you add two even numbers the sum (answer) will...

• sometimes be even and sometimes be odd

• always be odd

• always be even

• never be even

When you add an even number and an odd number the sum (answer) will...

• sometimes be even and sometimes be odd

• always be even

• always be odd

• never be odd

If 12 + 4 = 16, then 4 + _____ = 16

• 12

• 20

• 14

• 16

8 + 9 = _____ + 8

• 17

• 8

• 25

• 9

How can you find the sum of 8 + 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.