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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Langue Anglais ● Format PDF ● Pages 16 ● ISBN 9781448841172 ● Maison d’édition The Rosen Publishing Group, Inc ● Publié 2009 ● Téléchargeable 3 fois ● Devise EUR ● ID 8667790 ● Protection contre la copie Adobe DRM
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