Concept explainers
You can make concrete by mixing 1 part cement with 2 parts pea gravel and 3 parts sand. Using the same ratios, how much cement and how much pea gravel should you use if you want to make concrete with 8 cubic feet of sand? Solve this problem by reasoning about multiplication and/or division with quantities. Explain your reasoning.
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Mathematics for Elementary Teachers with Activities Plus MyLab Math -- Title-Specific Access Card Package (5th Edition)
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