Look at the sticks in problem A. How many sticks are in a bundle?
How many bundles of tens do you see? How many ones do you see?
There are 4 bundles of tens and 5 ones.
How many sticks do you see in all?
Look at the number sentence in section B. What strategies can you use to find the sum?
Possible answers: You can add using place value. You can also add using base-ten blocks or number lines.
What is the sum? How do you know?
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