If 256 enveloped letters were sent by truck, and 141 were sent by plane, how many more letters were sent by truck than plane? Readers answer this and other postal-related math problems.
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Språk Engelska ● Formatera PDF ● Sidor 16 ● ISBN 9781448841172 ● Utgivare The Rosen Publishing Group, Inc ● Publicerad 2009 ● Nedladdningsbara 3 gånger ● Valuta EUR ● ID 8667790 ● Kopieringsskydd Adobe DRM
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