QuestionSolve these problems. Remember to write number sentences.
(9)
Mr. Trueword ordered 3 new literature books. The first one cost , the second one cost , and the third one cost . Round each amount to the nearest dollar, and estimate to see about how much the three books cost.
(10) Christi spent for a gift. She handed the clerk a twenty-dollar bill. Round the price of the gift to the nearest dollar; then estimate to see about how much change Christi should get back.
Studdy Solution
STEP 1
1. We are rounding monetary amounts to the nearest dollar.
2. Estimation involves simple arithmetic with rounded numbers.
3. We will solve two separate problems, each with its own steps.
STEP 2
1. Problem 9: Round each book price to the nearest dollar and estimate the total cost.
2. Problem 10: Round the gift price to the nearest dollar and estimate the change from a twenty-dollar bill.
STEP 3
Round the cost of each book to the nearest dollar.
- First book:
- Second book:
- Third book:
STEP 4
Estimate the total cost by adding the rounded amounts.
Number sentence:
The estimated total cost for the three books is approximately .
STEP 5
Round the price of the gift to the nearest dollar.
- Gift:
STEP 6
Estimate the change Christi should receive after paying with a twenty-dollar bill.
Number sentence:
The estimated change Christi should get back is approximately .
The solutions are:
- Problem 9: Estimated total cost is .
- Problem 10: Estimated change is .
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