Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.
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Khan - Carrying When Adding 3-digit Numbers Part three in the addition series from Sal Khan (8:57) |
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Khan - Addition part 4 The fourth part in Sal's series on adding within 100 (8:49) |
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