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Numbers with one decimal place have one digit after the decimal point.
To round one of these numbers to the nearest whole number, think of a number line.
Remember that halfway numbers such as 7.5 or 8.5 or 14.5 always round up.
Numbers ending in 1, 2, 3 and 4 round down.
Numbers above this, such as 5, 6, 7, 8 and 9 round up.
Example 1
Round 12.3 to the nearest whole number.
Answer
12.3 is between 12 and 13 and is closer to 12.
12.3 rounds down to 12.
Example 2
Round 10.8 to the nearest whole number.
Answer
10.8 is between 10 and 11 and is closer to 11.
10.8 rounds up to 11.
Example 3
Round 16.5 to the nearest whole number.
Answer
16.5 is halfway between 16 and 17 and so we round up.
16.5 rounds up to 17.
Let's get started.
