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Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything. An entertaining introduction to mental maths and problem solving

by HarperCollins Publisher: Unknown Type
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£10.99
SKU SNG6923 ISBN 9780008444495 Author Eastaway, Rob

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Maths on the Back of an Envelope: Clever ways to (roughly) calculate anything. An entertaining introduction to mental maths and problem solving