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Introduction
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Read aloud
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Numbers with 2 decimal places have 2 digits after the decimal point.
To round one of these numbers to the nearest whole number think of a number line.
Numbers whose first decimal places is 0, 1, 2, 3, 4 round DOWN.
Numbers whose first decimal places is 5, 6, 7, 8 and 9 round UP.
Remember that halfway numbers, such as 7.50 round UP.
Here 7.35 has a 3 in its first decimal place so rounds DOWN to 7.
And 7.58 has a 5 in its first decimal place so rounds UP to 8.
Example 1
Round 12.63 to the nearest whole number.
Answer
12.63 is between 12 and 13.
It has a 6 as its first decimal place so rounds up.
12.63 rounds up to 13.
Example 2
Round 10.38 to the nearest whole number.
Answer
10.38 is between 10 and 11.
It has a 3 as its first decimal place so rounds down.
10.38 rounds down to 10.
Example 3
Round 16.50 to the nearest whole number.
Answer
16.50 is halfway between 16 and 17 and so we round up.
16.50 rounds up to 17.
Question
/ 10Mr Shepherd
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Teacher explanation