# Arithmetic of Integers

## Arithmetic of Integers

## Video

This video from *Khan Academy* discusses the various cases of adding and subtracting when dealing with negative integers, using a number line to justify the results.

Note: All *Khan Academy* content is available for free at www.khanacademy.org.

## Multiplication of Positive and Negative Integers

## Video

This video from *Khan Academy* gives the rules for multiplying positive and negative integers, along with various examples.

Note: All *Khan Academy* content is available for free at www.khanacademy.org.

If you’re curious about why a negative number multiplied by another negative number gives a positive result, see this video by *Khan Academy* which explains why this is the case due to the distributive law of multiplication.

Note: All *Khan Academy* content is available for free at www.khanacademy.org.

## Notes

Pages 6-8 of these notes from MathCentre discuss the rules of multiplying positive and negative integers, along with example. There are exercises on page 9 with the answers given, so you can check your work.

A pdf of this document can be downloaded here.

## Interactive Exercises

This NUMBAS exercise lets you test what you’ve learned about multiplication and division of integers. There is also a small section at the end which tests your knowledge of the order of operations.

Please click here to view this NUMBAS question in another window.

## Division of Integers

## Videos

This video from *Khan Academy* discusses the various scenarios that can occur when dividing positive and negative integers.

Note: All *Khan Academy* content is available for free at www.khanacademy.org.