Rounding is a way of making numbers simpler while keeping their value close to what it was. We round numbers to the nearest ten, hundred, or other place value to make them easier to work with.
Rounding makes numbers easier to read, estimate, and calculate with, but it is not the exact number.
To round a number, find the place value you are rounding to, then look at the digit to the right of it.
Always keep the digits to the left of the rounding place the same, and change all digits to the right to zeros.
When rounding to the nearest ten, look at the ones place.
Only the ones place tells you whether to round up or down when rounding to the nearest ten.
When rounding to the nearest hundred, look at the tens place.
Always check the tens place when rounding to the nearest hundred.
Rounding helps us estimate quickly and work with simpler numbers in real life, like when shopping, measuring, or comparing values.
Rounding is useful for estimation, but for exact answers you must use the original number.