This presentation provides both instructional and interactive slides practicing adding and subtracting three digit numbers. Included are three strategies, using drawings, number lines and expanded notation. There is an instructional slide and interactive slide for each strategy for both addition and subtraction. This presentation provides practice of standard NBT.7, but does not cover all aspects of the standard.
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.And also newly updated center games Addiing and Subtracting tens and hundreds through 900- smartboard