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Algrbaic Notation, Simplifying Expressioms
Key Stage: 3 ★

Add the opposite numbers in these crosses. What do you notice? Can you explain what you've noticed?

This problem provides self-checking practice of two digit addition. However, fundamentally this problem is about introducing and developing students' understanding of algebraic notation.

This resource has comprehensive teachers' notes and resources, linked from the problem page. This includes possible approaches and key questions, as well as possible support and extensions.


The file attached is a HTML file, which, when opened, automatically redirects you to the problem on the NRICH website.
Creative Commons "Sharealike"

Review

4

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philipeden

12 years ago
4

A great investigation that can be accessed by all abilities. Some will start to make the connection and introduce algebra to prove their findings, others will simply add up numbers and enjoy the fact that the pairs are always the same.

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