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If the number you are rounding is followed by 5, 6, 7, 8, or
9, round the number up. Example: 38 rounded to the
nearest ten is 40.
What Are You Rounding to?
If the number you are rounding is followed by 0, 1, 2, 3, or 4,
round the number down. Example: 33 rounded to the
nearest ten is 30.

To round a number to a particular place, look at the digit to its
right. If it is 5 or more, round up. If it is 4 or less, round down.

Example:
Round 53 to the nearest ten?
When rounding a number, you first need to ask: what are
you rounding it to? Numbers can be rounded to the nearest
ten, the nearest hundred, the nearest thousand, and so on.

Example: look at the number 2,827.

2,827 rounded to the nearest ten is 2,830
2,827 rounded to the nearest hundred is 2,800
2,827 rounded to the nearest thousand is 3,000
You notice all the numbers to the right of the place you are
rounding to become zeros.
Rules for Rounding Whole Numbers
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Look at the ones place.
53
2 is less than 5, so round down to 50
Example: Round 256 to the nearest hundred?
Look at tens place.
The number is  5, so round up to 300