6th grade math knowledge map info
StudyStack

A lesson on adding and subtracting positive and negative numbers. Includes examples and helpful rules to remember
Math is Fun

Integer Operations
StudyStack

In this video, Salman Khan of Khan Academy explains integer sums.
Khan Academy

Great site to use to get a scientific calculator to solve or check your problems you are working on. Larger and easy to use.
Scientific Calculator

Use a virtual balance to solve equations, including those with negative numbers.
National Library of Virtual Manipulatives

Work on negative numbers in a fun way. Help Casey Runner cross the finish line by choosing positive or negative signs.
Math is Fun

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

An overview of what integers, and rational and irrational numbers are.
Ask Dr.Math
