Addition and Subtraction Strategies

What strategy would you use to solve this:

6 + 2 =

• double +1

• count on

• double

• count back

What is the fastest way to solve this: 9 + 8 =

• doubles fact

• doubles +1 fact

• count on

• count back

• 1
• 2

42+51=

• 93

• 94

• 83

• 84

Bobie had 79 blocks. He let his brother play with 54 blocks. How many blocks does Bobie have now?

• 30

• 25

• 35

• 20

• 7
• 8

7 + __ = 17

• 9

• 12

• 10

• 11

5 + 10 = 6 + __

• 9

• 15

• 21

• 5

Which two related addition facts can help you solve 13 – 7?

• 7 + 6 = 13

• 7 + 13 =20

• 6 + 7 = 13

• 6 + 1 = 7

• 7 + 9 = 16

A part is missing in the equations. Find the missing part.

4 + ______ = 7

7 – 4 = ______

• 11

• 2

• 12

• 3