Round numbers to the nearest 10

Rounding to the nearest 10 means identifying the closest multiple of 10 by using place value: the tens digit is retained, the ones digit becomes 0, and a ones digit of 5–9 increases the tens digit by 1, while 0–4 leaves it unchanged. A number line clarifies that 5 ones is the midpoint between consecutive tens; this scope applies to multi-digit whole numbers, not decimals, negative numbers, or rounding to other place values.

Detailed Explanation: Round numbers to the nearest 10

To round a whole number to the nearest $10$ :

Look at the ones digit.
If the ones digit is $0$ – $4$ , keep the tens digit the same.
If the ones digit is $5$ – $9$ , increase the tens digit by $1$ .
Change the ones digit to $0$ .

Example: Round $347$ to the nearest $10$

The tens digit is $4$ .
The ones digit is $7$ .
Since $7$ is in the range $5$ – $9$ , increase the tens digit from $4$ to $5$ .
Change the ones digit to $0$ .

So,

347 \approx 350

On a number line, $347$ is closer to $350$ than to $340$ , so the nearest ten is $\boxed{350}$ .

Learn by doing: Round numbers to the nearest 10

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