IXL | Estimate to solve word problems

A ship is filled with 913 tons of cargo. It stops in the Bahamas, where sailors load 718 more tons of cargo onboard. About how many tons of cargo does the ship hold now? Choose the better estimate.

1,900

1,600

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Learn with an example

question

A construction company is repaving a damaged road. So far, they have repaved a total of 98,306 centimeters of the road. Today, they repaved 15,504 centimeters of the road. About how many centimeters of the road had they repaved before today? Choose the better estimate.

80,000

180,000

solution

Subtract the amount of road repaved today from the total amount of road.

98,306 − 15,504 = ?

Round each number to the nearest ten thousand.

98,306	–	15,504	= ?

100,000	–	20,000	= 80,000

80,000 is the better estimate.

Looking for more? Try these:

Lesson: Rounding numbers

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Teacher tools

Work it out

Not feeling ready yet? These can help:

B.1Estimate sums and differences of whole numbers

B.5Estimate products

C.4Estimate quotients

Lesson: Rounding numbers

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