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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 3

How can you use twizzles to multiply and divide?

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Twizzle Arithmetic

Arrow arithmetic, but with a twist.

Arrow Arithmetic 2

Stage: 4 Challenge Level: Challenge Level:2 Challenge Level:2

One good way to realise a twizzle as a manipulative is with a piece of elastic. You need to mark 3 spots on the elastic - say a black spot for the origin, a blue spot for the end of the unit arrow, and a red spot for the end of the number arrow.

Make a few of these elastic twizzles up, and see if you can use them to do simple calculations.