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To multiply a decimal by a power of a 10, move the decimal point to the Left Right To divide a decimal by a power of a 10, move the decimal point to the Right Left To divide a decimal by 100, move the decimal point ________ place values. one two three To multiply a decimal by a 1000, move the decimal point ________ place values. one two three 2.5 × 10 = 673 ÷ 100 = 523 ÷ 10 = 62.8 × 100 = 73.568 × 100 = What math operation does a fraction indicate? Division Multiplication Subtraction Addition 310 10 = 10 84 = 100 73 = 0. 1000 2 = 0. Think about setting up equivalent rates to solve the problem. $11.50 2 lbs If 2 pounds of cheese cost $11.50, then how much will 20 pounds cost? multiply by 10 multiply by 10 ◠ ◡ = $ 20 lbs .00 If 4 pounds of coffee cost $21.95, how much will 40 pounds cost? $21.95 4 lbs = $ 40 lbs If 50 pounds of coffee cost $274.30, how much will 5 pounds cost? $274.30 50 lbs = $ 5 lbs If 30 pounds of cheese cost $172.50, then how much will 3 pounds cost? $17.50 30 lbs = $ 3 lbs |