topic I
5 hours
Decomposition Strategies for Subtraction
Math Grade 1 Curriculum Map
Description
Similar to Topic E’s addition methods, Topic I allows students to learn methods for subtraction which involve subtracting 0 and 1, subtracting the whole number, subtracting one less than the whole number, and using familiar decompositions (5-groups and partners of 10) to conceptualize subtraction as finding a missing part (1.OA.6).
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Prerequisites
Credits
From EngageNY.org of the New York State Education Department. Grade 1 Mathematics Module 1, Topic I.
Available from engageny.org/resource/grade-1-mathematics-module-1-topic-i; accessed 2015-05-29.
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