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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

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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
Country USA
Brand HarperCollins Children's Books
Manufacturer HarperCollins
Binding Kindle Edition
ReleaseDate 2019-10-17
Format Kindle eBook

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Country	USA
Brand	HarperCollins Children's Books
Manufacturer	HarperCollins
Binding	Kindle Edition
ReleaseDate	2019-10-17
Format	Kindle eBook