Numbers Facts

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Learning games, educational comics, reading activities, and more.

6th grade math knowledge map info

In this video, Salman Khan of Khan Academy demonstrates multiplying and dividing negative numbers.

In this video, Salman Khan of Khan Academy demonstrates adding and subtracting negative numbers.

This page explains how to do basic addition and gives examples for practice of sums.

Test how well you know fourth-grade math vocabulary

A functional scientific calculator with the look and feel of a real calculator for teaching how to use a calculator over the web.

A list of divisibility rules and examples of how to apply them.