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How many dots do you see?

How could we solve this problem in our heads?

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How many dots do you see?

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can you find the sum of 7+8 in your head?

Use one of these sentence starters:

I solve it by...

I noticed...

I used doubles because...

I made 10 by...

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Making a Ten:

7+3=10, then add 5 more

Doubles:

7+7=14, then add 1

Count On:

Start at 9, count 7 more

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Use what you learned.

How can you solve this one in your head?

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What’s your favorite strategy for solving addition problems?

Why?