Rounding decimals to a whole number

Mathematics · Fractions · ages 8-9

Name ______________________ Date ____________

Round 3.7 to the nearest whole number.
- 3
- 4
- 5
- 37
Round 3.7 to the nearest whole number.
- 3
- 4
- 5
When the digit after the decimal point is 5 or more, the number rounds up.
Circle one: True False
Round 3.2 to the nearest whole number.
- 2
- 3
- 4
Round 8.4 to the nearest whole number.
Answer: ______________
What whole number does 5.9 round to? Type the number.
Answer: ______________
Look at the number line. Where does 6.5 round to?
- 6
- 6.5
- 7
6.5 rounds to 7 when you round to the nearest whole number.
Circle one: True False
Ben rounded 7.5 down to 7. Is that correct?
Circle one: True False
A recipe needs 2.5 cups of flour, but the simple version only uses whole cups. How many cups should you use?
- 2
- 2.5
- 3

Answer key

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

4 · 3.7 is between 3 and 4, and it is closer to 4 because 7 tenths is more than half.
4 · The digit after the point is 7, which is 5 or more, so round up to 4.
True · That's the rule: 5 or more rounds up, and less than 5 rounds down.
3 · The digit after the point is 2, which is less than 5, so round down to 3.
8 · The tenths digit is 4, which is less than 5, so 8.4 rounds down to 8.
6 · The digit after the point is 9, which is 5 or more, so round up to 6.
7 · 6.5 is halfway between 6 and 7. Halfway numbers round up, so it rounds to 7.
True · 6.5 sits exactly halfway between 6 and 7, and the rule says a halfway number rounds up, so 6.5 rounds to 7.
False · No. 7.5 is halfway, and halfway numbers always round up, so it should round to 8.
3 · 2.5 is halfway between 2 and 3. Halfway rounds up, so use 3 cups.