IXL | Two-step word problems: identify reasonable answers

A youth group meets 2 times a month for 3 hours at a time. The group leader runs those meetings. He also spends 3 to 5 hours a month planning and preparing. He estimates he works about 24 hours a month in total. Is that a good estimate?

Yes.

No, it is much too high.

No, it is much too low.

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question

Lots of people are waiting to ride the bumper cars at the fair. There are 22 boys and 19 girls waiting. There are also 12 women and 11 men.

A worker estimates that is about 60 people in all. Is that a good estimate?

Yes.

No, it is much too high.

No, it is much too low.

solution

To check the estimate, find about how many people are waiting. Use numbers that are easy to work with and that are close to the numbers in the problem.

There are 22 boys and 19 girls waiting. That is about 20 of each. Add to find about how many kids are waiting.

There are also 12 women and 11 men waiting. That is about 10 of each. Add to find about how many adults are waiting.

Add to find about how many people are waiting in all.

So, 60 people is a good estimate.

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