Addition and subtraction
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articleMaking sense of positives and negatives
This article suggests some ways of making sense of calculations involving positive and negative numbers. -
articleDot card games
These games devised by Jenni Way use dot cards which will help children see the structure of numbers 1-6 and give them confidence as they begin to add and subtract these numbers. -
articlePlace value as a building block for developing fluency in the calculation process
This article for primary teachers encourages exploration of two fundamental ideas, exchange and 'unitising', which will help children become more fluent when calculating. -
articleDeveloping number fluency - what, why and how
In this article for primary teachers, Lynne McClure outlines what is meant by fluency in the context of number and explains how our selection of NRICH tasks can help. -
articleLet's get flexible!
In this article for primary teachers, Ems outlines how we can encourage learners to be flexible in their approach to calculation, and why this is crucial.
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articleGetting the balance right
In this article for primary teachers, Ems shares some common misconceptions surrounding the equals sign, and suggests ways to help learners develop their understanding. -
pageMathdoku demonstration
This video of Charlie and Liz solving a 6 by 6 Mathdoku may give you ideas for strategies to try. -
projectHow many?
5 to 7
This project challenges you to work out the number of cubes hidden under a cloth. What questions would you like to ask?
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problemDouble digit
Age11 to 14Challenge level
Choose two digits and arrange them to make two double-digit numbers. Now add your double-digit numbers. Now add your single digit numbers. Divide your double-digit answer by your single-digit answer. Try lots of examples. What happens? Can you explain it?