Reading, writing and representing numbers

There are 35 NRICH Mathematical resources connected to Reading, writing and representing numbers
How would we count?
problem

How would we count?

Age
5 to 11
Challenge level
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An activity centred around observations of dots and how we visualise number arrangement patterns.
Models in mind
article

Models in mind

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

Take three numbers

Age
7 to 11
Challenge level
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What happens when you add three numbers together? Will your answer be odd or even? How do you know?
Dotty Six
problem

Dotty Six

Age
5 to 11
Challenge level
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Dotty Six is a simple dice game that you can adapt in many ways.
Number match
problem

Number match

Age
5 to 11
Challenge level
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A task which depends on members of the group noticing the needs of others and responding.
Even and odd
problem

Even and odd

Age
5 to 7
Challenge level
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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?
Galley Division
problem

Galley Division

Age
14 to 16
Challenge level
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Can you explain how Galley Division works?
Balance Power
problem

Balance Power

Age
11 to 18
Challenge level
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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?
Arrow Arithmetic 1
problem

Arrow Arithmetic 1

Age
14 to 16
Challenge level
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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.
Stone Age Counting
problem

Stone Age Counting

Age
5 to 7
Challenge level
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What could these drawings, found in a cave in Spain, represent?