## Reflection: Intervention and Extension How Addition and Subtraction are Related (Part 3 of 3) - Section 1: Introduction

I have pointers that I use for these lessons but I recognized that it was kind of fun being the pointer.  I had my students stand up and act out some of the addition and subtraction on the number line.

For 5 - (-4) I'd ask:

Where are we?  5

Which way should we point? LEFT

Why?  We are subtracting.

How far should we move from 5?  4 steps

Should we move forwards or backwards?  Backwards

Why? We're subtracting a negative.

We continued in the same fashion for the 8 problems on this first page.  We used pointers for the rest of the lesson!

Get Kinesthetic!
Intervention and Extension: Get Kinesthetic!

# How Addition and Subtraction are Related (Part 3 of 3)

Unit 1: Rational Number Operations
Lesson 9 of 27

## Big Idea: Students use a number line to explore the relationship between addition and subtraction.

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Standards:
Subject(s):
Math, Number Sense and Operations, Additive inverse, Relationship between addition and subtracti, rational numbers
50 minutes

### Grant Harris

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