Refer to Problem 77. In getting my swimming pool ready for summer, I usually buy the following supplies. Use rounding to estimate the total cost: 8 boxes of baking soda at 89 cents per box; 20 gallons of bleach at $1.29 for 96 ounces; 8 pounds of chlorine stabilizer at $11.99 for a 4-pound bottle; and four 24-can cases of refreshments at 60 cents per can.
77. One of the most valuable uses of estimation is to roughly keep track of the total cost of items when shopping. Use rounding to estimate the total cost of the following items at a grocery store: 4 cans of green beans at 79 cents each; 8 cups of yogurt at 49 cents each; a 29-ounce steak at $5.80 per pound; 4 energy drinks at $1.29 each; and 100 ounces of mineral water at $3.08 per gallon. (Hint: You may need to look up conversions for units of weight and volume.)
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Math in Our World
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