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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Idioma Inglés ● Formato PDF ● Páginas 16 ● ISBN 9781448841172 ● Editorial The Rosen Publishing Group, Inc ● Publicado 2009 ● Descargable 3 veces ● Divisa EUR ● ID 8667790 ● Protección de copia Adobe DRM
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