### There are 21 results

Broad Topics >

Numbers and the Number System > Representing numbers

##### Age 5 to 7 Challenge Level:

What do you see as you watch this video? Can you create a similar video for the number 12?

##### Age 7 to 11 Challenge Level:

Can you find some examples when the number of Roman numerals is fewer than the number of Arabic numerals for the same number?

##### Age 5 to 11 Challenge Level:

Dotty Six is a simple dice game that you can adapt in many ways.

##### Age 5 to 7 Challenge Level:

This activity is best done with a whole class or in a large group. Can you match the cards? What happens when you add pairs of the numbers together?

##### Age 14 to 16 Challenge Level:

Have you seen this way of doing multiplication ?

##### Age 5 to 11 Challenge Level:

Dotty Six game for an adult and child. Will you be the first to have three sixes in a straight line?

##### Age 3 to 14

This article looks at how models support mathematical thinking about numbers and the number system

##### Age 5 to 7 Challenge Level:

Can you find different ways of showing the same number? Try this matching game and see!

##### Age 14 to 16 Challenge Level:

Can you explain how Galley Division works?

##### Age 11 to 18 Challenge Level:

Using balancing scales what is the least number of weights needed
to weigh all integer masses from 1 to 1000? Placing some of the
weights in the same pan as the object how many are needed?

##### Age 14 to 16 Challenge Level:

Make the twizzle twist on its spot and so work out the hidden link.

##### Age 7 to 18

This article for the young and old talks about the origins of our number system and the important role zero has to play in it.

##### Age 14 to 16 Challenge Level:

A loopy exploration of z^2+1=0 (z squared plus one) with an eye on
winding numbers. Try not to get dizzy!

##### Age 14 to 16 Challenge Level:

Arrow arithmetic, but with a twist.

##### Age 14 to 16 Challenge Level:

How can you use twizzles to multiply and divide?

##### Age 14 to 16 Challenge Level:

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

##### Age 14 to 16 Challenge Level:

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.

##### Age 5 to 11

This article for teachers describes how modelling number properties
involving multiplication using an array of objects not only allows
children to represent their thinking with concrete materials,. . . .

##### Age 7 to 14

First or two articles about Fibonacci, written for students.

##### Age 5 to 11

This article for teachers describes how number arrays can be a
useful reprentation for many number concepts.

##### Age 7 to 11 Challenge Level:

Read this riddle and see if you can work out how the trees must be planted.