Estimating to Nearest Tens by Rounding Off

Introduction
When estimating a number to the nearest tens place, we need to find the closest multiple of ten. This can be achieved by rounding off the given number. Rounding off involves changing a number to a nearest multiple of ten, hundred, or thousand.

Steps to Estimate 42902 to the nearest tens place
1. Identify the tens place in the given number. In 42902, the tens place is the digit in the ten thousands place, which is 0.
2. Look at the digit to the right of the tens place. In this case, it is 2.
3. If the digit is 5 or greater, round up to the next tens place. If the digit is less than 5, round down to the same tens place. In this case, 2 is less than 5, so we round down to 42900.
4. Therefore, the estimated number is 42900.

Conclusion
Rounding off is a useful strategy when making quick estimates. It is important to note that rounding off can sometimes result in an estimate that is not exact, but is close enough for most purposes.

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