**Chapter 2 Addition and Subtraction Concepts**

## 2.10 Problem Solving- Use logical reasoning

## 2.9 checking addition and subtraction

## 2.8 Adding and Subtracting Money

2.7 Estimating sums and differences

Note: I made a mistake in the video and the 2nd example problem should have been subtraction rather than addition. Teachers make mistakes too! Oops!

Note: I made a mistake in the video and the 2nd example problem should have been subtraction rather than addition. Teachers make mistakes too! Oops!