Rounding decimals (age 9+) · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Rounding decimals

Mathematics · Fractions · ages 9-10
Name ______________________   Date ____________

  1. Round 7.62 to the nearest whole number.

    Answer: ______________

  2. Round 3.47 to the nearest whole number.

    • 3
    • 4
    • 3.5

  3. To round a decimal, you look at the digit right after the place you are rounding to.

    Circle one:   True   False

  4. Round 3.47 to one decimal place.

    • 3.4
    • 3.5
    • 3.47

  5. All of these numbers round to 5 when rounded to the nearest whole number. Which one is farthest away from 5?

    • 5.49
    • 4.5
    • 5.4
    • 4.6

  6. Which whole number is 8.5 closest to when rounding?

    • 8.5
    • 8
    • 9

  7. Round 12.95 to one decimal place.

    • 12.9
    • 13.0
    • 12.95

  8. You want two different decimals that both round to 4.6 when rounded to the nearest tenth. Which pair works?

    • 4.61 and 4.64
    • 4.56 and 4.64
    • 4.65 and 4.74
    • 4.55 and 4.65

  9. Ben rounded 6.45 to one decimal place and wrote 6.4. Is Ben correct?

    Circle one:   True   False

  10. A plank measures 7.38 m. Rounded to one decimal place, what is its length in metres?

    7.38 m(actual)7.38Rounded to1 d.p.7.4

    Answer: ______________

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Answer key

For grown-ups. Fold this page away before handing over the rest.

Rounding decimals W1-mt_Ii1hV4V5ql-s1

  1. 8 · Look at the tenths digit. It is 6, which is 5 or more, so the 7 ones round up to 8.
  2. 3 · The tenths digit in 3.47 is 4, which is less than 5, so the whole number stays 3.
  3. True · That digit tells you whether to round up or keep the number the same.
  4. 3.5 · The hundredths digit is 7, so the tenths digit rounds up from 4 to 5, giving 3.5.
  5. 4.5 · Numbers that round to 5 sit between 4.5 and 5.49. Subtract each from 5 to see the gap. 4.5 has a gap of 0.5, which is the biggest.
  6. 9 · The tenths digit is 5. When a decimal is exactly halfway, we round up, so 8.5 rounds to 9.
  7. 13.0 · The hundredths digit is 5, so the 9 rounds up. That carries over, making 12.95 round to 13.0.
  8. 4.56 and 4.64 · Only the hundredths digit matters when rounding to tenths. 4.56 has a 6 in the hundredths place, so it rounds up to 4.6. 4.64 has a 4, so it rounds down to 4.6.
  9. False · The hundredths digit is 5, so the 4 should round up to 5, giving 6.5, not 6.4.
  10. 7.4 · The hundredths digit in 7.38 is 8, which is 5 or more, so the tenths digit rounds up from 3 to 4, giving 7.4.
Worksheet · LightMySky