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Arrow Arithmetic 1

The first part of an investigation into how to represent numbers using geometric transformations that ultimately leads us to discover numbers not on the number line.

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Arrow Arithmetic 2

Introduces the idea of a twizzle to represent number and asks how one can use this representation to add and subtract geometrically.

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Twizzle Arithmetic

Arrow arithmetic, but with a twist.

Arrow Arithmetic 3

Age 14 to 16 Challenge Level:

Here are two audio/visual clips showing geometrical multiplication and division of numbers represented by double arrows.

Calculation of 3 times 2

Calculation of 3 divided by 2.