Grade level: 3rd – 5th

Skills: Rounding

Related environmental issues: Water

Area level: National

Our country withdraws a lot of water for our homes, business, schools, industry, agriculture, as well as for electricity generation. The table below shows how much water is consumed for those purposes by a single person in the United States in a year.

1.Round the number of gallons used for homes to the nearest hundreds.

2.Round the number of gallons used for agriculture to the nearest ten thousands.

3.Which number becomes 200,000 when rounded to the nearest hundred thousands?

4.Which place would you have rounded 50,590 to if your answer was 50,590?

Source: US Geological Survey

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Answer keys

1. 4,400
2. 150,000
3. electricity generation
4. the tens place