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To me, it's a way of simplifying a number.

For example, I go on a car journey of 32.561km. When talking to my old Mum, I might say I went for a car trip for about 30km. In other words I rounded to the nearest 10. Later on, talking with my son, I might say, I went on a 33km car trip. It's an approximation that depends on the circumstances (certainly in practical terms).

Using money, say something costs $292.45c. I could say it's about $300 (rounded to the nearest $100), or $290 (rounded to the nearest $10) or $292 (rounded to the nearest $1)

It is very useful.

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Q: What is mathematical rounding?
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Related questions

What is Mathematical skill that estimates or approximates a given value?

the mathematical skill is rounding 5 or above go up 4 or below go down


How can rounding come in handy?

Decimal numbers in calculations often display a spurious degree of accuracy. By removing these unnecessary digits, rounding can simplify mathematical operations without compromising the results.


How should numbers in questions and answers be rounded on WikiAnswers?

There are no set rules about rounding numbers, so when rounding numbers, mathematical rules about rounding can be used. For example, 14 would be rounded to 10, but 15 would be rounded to 20. For another example, 1144 is rounded to 1140 and 1145 is rounded to 1150.


What is 19.76485 rounded?

20 rounding units. 20.0 rounding tenths 19.8 rounding hundredths 19.76 rounding thousandths 19.765 rounding tenthousandths 19.7649 rounding hundred thousandths


What does 84651 round to?

It depends on what you are rounding by. If you are rounding by ten-thousands=80000 If you are rounding by thousands=85000 If you are rounding by hundreds=84700 If you are rounding by tens=84650


What is 6.324 rounded to two decimal places?

That depends on how you are rounding: Rounding up = 6.33 Rounding down = 6.32 Rounding nearest = 6.32


What would you round 415 to?

That would depend on what you were rounding it to. If rounding to the nearest whole number, then it does not need rounding. If rounding to the nearest ten, it would be 420. If rounding to the nearest hundred, it would be 400.


What is rounding an example of?

rounding is an example of a guess .


What is Von Neumann rounding?

Rounding to odd.


What is 4.409603136 rounding it?

Depends on where you are rounding it to.4.4096031364.409603144.40960314.4096034.409604.40964.4104.414.44.


What does 1.726 round to?

If you are rounding to 100ths it is 1.73 . If you are rounding to 10ths it is 1.7 . If you are rounding to integers it is 2 .


How do you estimate 3444 times 670 with rounding?

You can calculate 3444 times 670 without rounding or you can estimate it WITH rounding. But you cannot estimate it without rounding.