Description
Recognizing that any problem involving addition and subtraction of rational numbers can be written as a problem using addition and subtraction of positive numbers only.
Downloads
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Credits
From EngageNY.org of the New York State Education Department. Grade 7 Mathematics Module 2, Topic A, Lesson 8.
Available from engageny.org/resource/grade-7-mathematics-module-2-topic-lesson-8; accessed 2015-05-29.
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