Skill: Round numbers to the nearest 10

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

1. Look at the ones digit.
2. If the ones digit is $0$–$4$, keep the tens digit the same.
3. If the ones digit is $5$–$9$, increase the tens digit by $1$.
4. 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 $\boxed{350}$.