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Round Tenths to Whole Numbers

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Round Tenths to Whole Numbers

Help plan a day out by rounding decimal measurements to the nearest whole number. A decimal part of 0.5 or more rounds up; a decimal part below 0.5 rounds down.

Find the nearest whole number

Use the number lines to picture where each decimal sits between two whole numbers.

1.A trail sign says the lookout is 4.3 kilometres away. Round 4.3 to the nearest whole kilometre.
44.14.24.34.44.54.64.74.84.95
  • 3 km
  • 4 km
  • 5 km
2.The picnic table is 6.8 metres long. Round 6.8 to the nearest whole metre.
66.16.26.36.46.56.66.76.86.97
  • 6 m
  • 7 m
  • 8 m
3.Round 12.5 to the nearest whole number. Remember that a decimal part of exactly 0.5 rounds up.
1212.112.212.312.412.512.612.712.812.913

Round for the trip

Give each answer as a whole number. Show or explain your thinking where asked.

4.The group walks 3.2 km before stopping for a snack. Round 3.2 to the nearest whole kilometre.
5.A water bottle holds 0.7 litres. Round 0.7 to the nearest whole litre.
6.A lookout is 18.9 m above the track. Round 18.9 to the nearest whole metre.
7.True or false? When 9.4 is rounded to the nearest whole number, the answer is 10. Correct the statement if it is false.
TrueFalse
8.Hemi says 7.6 rounds down to 7 because the whole-number part is 7. Is Hemi correct? Explain using the tenths digit.
9.The group has 5.3 kilometres left to walk. Round 5.3 to the nearest whole kilometre, then explain why it rounds that way.
10.Make your own decimal between 14.0 and 15.0 that rounds to 15. Write the decimal and the rounded answer.
1414.114.214.314.414.514.614.714.814.915

2 printable pages

  • Round Tenths to Whole Numbers, page 1 of 2: Find the nearest whole number, Round for the trip

    Page 1

  • Round Tenths to Whole Numbers, page 2 of 2: 5. A water bottle holds 0.7 litres. Round 0.7 to the nearest whole litre.

    Page 2

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