Arithmetic of Integers

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.

These notes from MathCentre explain the rules behind the arithmetic of the integers when working with negative integers.

A pdf of this document can be downloaded here.

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.

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.

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.

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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.

See page 8 of these notes from MathCentre for the rules on dividing positive and negative integers. There are exercises with answers at the end that you can use for practice.

A pdf of this document can be downloaded here.