Here are a few examples:
1. Round off the number 346 to the nearest tens.
We look at the number after the 4 and see that it is a 6. Then we round up the number to 350.
2. Round off 855 to the nearest hundreds.
Here we look at the tens digit after the 8 and see that is a 5. We then round the number up to 900.
3. Round off the number 243,579 to the ten thousands.
Here we look at the digit after the ten thousands place and see that it is a 3. The number is therefore rounded down to 240,000.
