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Documents Modeling Subtraction With Number Lines and Counters Course 2 7.NS.2a.

Slide 1 Modeling Subtraction With Number Lines and Counters Course 2 7.NS.2a Slide 2 Today’s Lesson When working math problems, it is important to understand the meaning…

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Section 3.3 Algorithms for Addition and Subtraction Mathematics for Elementary School Teachers - 4th Edition OâDAFFER, CHARLES, COONEY, DOSSEY, SCHIELACK Developing Algorithms…