IXL | Estimate products word problems: identify reasonable answers

Javier read that an active teenager should eat 5 servings of fruits or vegetables a day. Javier decides to eat 5 servings a day for all 31 days in July.

He works out that will be 155 servings in all. Does that sound about right?

Yes.

No, it is much too high.

No, it is much too low.

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Learn with an example

question

The teachers at New Mountain Middle School bought packages of pencil-top erasers for all of the students. They bought 397 packages of erasers. Each package contained 7 erasers. A student figured out that the teachers bought 1,649 erasers. Does that sound about right?

Yes.

No, it is much too high.

No, it is much too low.

solution

Check whether the student's work is reasonable. Find about how many pencil-top erasers the teachers bought. Use numbers that are easy to work with and that are close to the numbers in the problem.

The teachers bought 397 packages of erasers. That is about 400 packages.

Each package contained 7 erasers. Multiply.

400

2,800

The teachers bought about 2,800 erasers. So, 1,649 is much too low.

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Lesson: Estimating products

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