Duplicar Y Multiplica r/ Doubling And Multiplying
"Young readers will use objects found in everyday life to support their learning of number sense and calculation. This book explains the concept that doubling a number of objects is the same as two times the number of objects. Each multiplication or doubling problem in the book is followed by a step-by-step guide that explains how to solve the problem, and is reinforced by a photograph that illustrates the way the problem was solved."
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