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Reteach: Multiplicative Comparison Product Unknown




Reteach: Guided Practice

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Independent Practice: Multiplicative Comparison Product UnknownSolve each problem below by identifying the number in one set, and the multiplier. Multiply the number in one set by the multiplier. Go back to the problem to make sure you have answered the question being asked, and that your answer makes sense. 
A rabbit can go two feet in one jump. A kangaroo can go five times as far as a rabbit. How far can a kangaroo go in one jump? The number in one set is 2 . The multiplier is 5 . 2 x 5 = 10 The kangaroo can go 10 feet in one jump. Since you are multiplying a whole number by a whole number, the distance the kangaroo can go should be larger than the distance the rabbit can go. Is your answer reasonable?

Amanda grew two plants for the science fair. The first plant was eight centimeters tall. The second plant was three times as tall. How tall was the second plant? The number in one set is 8 . The multiplier is 3 . 8 x 3 = 24 The second plant was 24 centimeters tall. Since you are multiplying a whole number by a whole number, the height of the second plant should be more than the height of the first plant. Is your answer reasonable?

Chris can go 10 miles per hour on his bicycle. Jill can go seven times that fast on her motorcycle. How fast can Jill go on her motorcycle? The number in one set is 10 . The multiplier is 7 . 10 x 7 = 70 Jill can go 70 miles per hour on her motorcycle. Since you are multiplying a whole number by a whole number, the speed Jill can go on her motorcycle should be faster than the speed Chris can go on his bicycle. Is your answer reasonable?

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The various resources listed below are aligned to the same standard, (4OA02) taken from the CCSM (Common Core Standards For Mathematics) as the Word problems Worksheet shown above.
Multiply or divide to solve word problems involving multiplicative comparison, e.g., ...
Similar to the above listing, the resources below are aligned to related standards in the Common Core For Mathematics that together support the following learning outcome:
Use the four operations with whole numbers to solve problems