Young Mathematicians at Work: Constructing Number Sense, Addition and Subtraction v. 1 The first in a three-volume set, "Young Mathematicians at Work" focuses on young children between the ages of four and eight as they construct a deep understanding of number and the operations of addition and subtraction.

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Young Mathematicians at Work: Constructing Number Sense, Addition, and Subtraction

Fosnot, Catherine Twomey; Dolk, Maarten

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