Math Mammoth Grade 1-A WorktextMath Mammoth Grade 1 A (Light Blue Series) student worktext teaches the concepts of addition, subtraction, and place value with two digit numbers. It is meant for the first half of grade 1. This student worktext contains both the necessary instruction and the problems & exercises (the 'text' & and the 'work'; thus a "worktext"), and is fairly self teaching. The curriculum is aligned to the Common Core standards. This is the full color version; in
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