Math in Focus Chapter 2

This video explains how to decompose numbers to help you add them together mentally.

Here we talk about different steps we could take to add two 2-digit numbers together mentally and showing our thinking with equations.

In this video we look at three different strategies we can use to show how we solve addition problems with regrouping.

Students explain how they used mental math to solve the problem 149 + 33. Students use Number Bonds to help them organize their thinking.