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Lesson: Adding by Breaking Apart Ones Mathematics • 1st Grade

In this lesson, we will learn how to add a 1-digit number to a 2-digit number by breaking apart ones and model this with equations.

Lesson Plan

Students will be able to

Q1:

We can make a ten to help us add 36 and 7.

Break apart 7 to make a ten.

Pick the matching calculation.

Pick the calculation that is equal to .

What is ?

Q2:

Make a ten to add.

Pick the calculation that is equal to .

What is ?

Q3:

Look at how Maged added by breaking apart ones to make a ten.

All of these have the same sum.

He showed that is the same as . What is ?

Make a ten to find the answer to .