Author:
Lorena Hernandez

This tutorial is aimed to help 7th grade students.

CCSS.MATH.CONTENT.7.NS.A.1

Apply and extend previous understandings of addition and subtraction to add and subtract rational numbers; represent addition and subtraction on a horizontal or vertical number line diagram.

Tutorial

To master the standard above we will first look at how to add and subtract positive and negative numbers on a horizontal number line. To answer quiz questions 1-6 you will have to watch the video below called "Adding and Subtracting Integers on a Number Line." You are free to pause the video and take notes while you watch.

To master the standard above we will now look at how to add and subtract positive and negative numbers on a vertical number line. To answer the 4 quiz questions you will have to watch the video below called "Adding and Subtracting Integers using the hot air balloon model." You are free to pause the video and take notes while you watch.

Here are a few websites that explain how to add and subtract numbers on a horizontal and vertical number line in a different way.

__Horizontal Number line__

http://www.dummies.com/how-to/content/how-to-add-a...

__Vertical Number Line__