Online Investigations

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Welcome to hours of mathematical enjoyment!

(Ages 9-12): Add and Subtract with Negative Numbers - Part 1 (FREE!)

Explore how addition and subtraction works with negative numbers. Part 1 investigates what happens when you start on a positive or negative number and add or subtract a postive number.

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(Ages 9-12): Multiply and Divide Negative Numbers (FREE!)

Explore how multiplication and division work with negative numbers. Explore patterns in number facts to deduce well known relationships and explain why they work.

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(Ages 10-13): Add and Subtract with Negative Numbers - Part 2 (FREE!)

Explore how addition and subtraction works with negative numbers. Part 2 investigates what happens when you start on a positive or negative number and add or subtract a negative number.

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(Ages 10-13): Negative Number Reflections (FREE!)

Explore how multiplying and dividing by different positive and negative numbers moves things around on the number line. Start by investigating reflections and then find out how to make numbers move closer to or further away from zero.

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