Round to the nearest whole number
3.67 rounds to 4 because the tenths digit is 6.
The tenths decide when rounding to a whole number.
Year 5
Round decimals with two decimal places to the nearest whole number and to one decimal place
Round decimals to the nearest whole number and to one decimal place accurately.
Lesson overview
Number - decimals and percentages
Rounding decimals follows the same idea as rounding whole numbers. First decide the place you are rounding to, then look one place to the right to decide whether the number rounds down or up.
Round to one decimal place
5.24 rounds to 5.2 because the hundredths digit is 4.
The hundredths decide when rounding to one decimal place.
Use the halfway point
6.85 rounds to 6.9 because the hundredths digit is 5.
Five in the deciding place rounds up.
Worked example
Round 4.36 to one decimal place.
- The target place is tenths.
- Look at the hundredths digit, which is 6.
- Because 6 is 5 or more, the tenths round up.
- So 4.36 rounds to 4.4.
Round 1: Learn it
Decide the target place first, then check one place to the right.
Finish this round to unlock Round 2: Show you know it.
Question 1
Round 3.67 to the nearest whole number.
Question 2
Round 5.24 to one decimal place.
Question 3
Round 6.85 to one decimal place.
Question 4
Round 4.36 to one decimal place.
Question 5
Round 8.49 to the nearest whole number.
Common mistakes
Watch for these as you work through the lesson.
- Rounding to the wrong decimal place.
- Looking at the wrong deciding digit.
- Forgetting that 5 rounds up.
Related topics
These ideas connect closely to this lesson.
- Read, write, order and compare numbers with up to three decimal places.
- Solve problems involving numbers up to three decimal places, percentages and decimal equivalents of fractions.