Addition/Subtraction strategies

Which is a doubles fact?

• 6 + 7

• 6 + 6

• 6 - 5

• 7 + 9

• 2 + 2 = 4

• 3 + 3 = 6

• 4 + 4 = 8

• 5 + 5 = 10

Which addition sentence can you use to check the subtraction 11 - 2?

• 9 + 2 = 11

• 6 + 2 = 8

• 2 + 7 = 9

• 2 + 2 = 4

Ana has 6 toy cars. 3 are small. The rest are big. How many cars are big?

• 2

• 4

• 9

• 3

8 + 8 =

• 12

• 10

• 16

• 14

7 =

• 3 + 3 - 1

• 2 + 2 + 2

• 4 + 4 + 1

• 3 + 3 + 1

Which has the same sum as 7 + 8?

• 1 + 7 + 8

• 1 + 8 + 8

• 7 + 7 + 1

• 7 + 7 + 2

Which picture shows doubles plus one?

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