Round numbers to the nearest 10

Rounding to the nearest 10 means replacing a whole number with the closest multiple of 10 by using the ones digit: numbers ending in 0–4 round down, while those ending in 5–9 round up to the next ten. A number line and place-value reasoning show that a ones digit of 5 is the midpoint and is rounded upward; the focus is on whole numbers within the typical hundreds and thousands range, not rounding to larger place values or using decimal numbers.

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 $(0,1,2,3,)$ or $4$ , round down to the previous ten.
If the ones digit is $(5,6,7,8,)$ or $9$ , round up to the next ten.

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

The ones digit in $(347)$ is $7$ .
Since $7$ is $5$ or greater, round up.
The tens digit changes from $4$ to $5$ , and the ones digit becomes $0$ .

Therefore,

347 \approx 350

So, $(347)$ rounded to the nearest $(10)$ is $(350)$ .

Learn by doing: Round numbers to the nearest 10

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Rounding Whole Numbers - Hundreds to Nearest Ten

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