a. Lindsay calculates two-fifths of 1260 by using the following strategy: First, she finds half of 1260, which is 630. Then she subtracts one tenth of 1260, which is 126, from 630 and gives the answer, 504. Discuss the ideas behind Lindsay’s strategy. Then write a string of equations that incorporate this strategy and that show why the strategy is valid. What property of arithmetic is involved? Write your equations in the following form:
b. Terrell calculates
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Mathematics for Elementary Teachers with Activities (5th Edition)
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