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Suppose you need to round to n digits.
Look at the (n+1)th digit.
If it is 0 you do not need to round. You simply delete all digits after the nth.
If it is 1, 2, 3 or 4 you again delete all digits after it.
If it is 6, 7, 8 or 9 you increase the nth digit by 1 and delete all subsequent digits.
If it is 5, then
if n is even you delete all subsequent digits,
if the nth digit is odd you add one and delete all subsequent digits.
Statistically naive people recommend that 5 is always rounded up without realising that this introduced an upward bias.
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoLook to the right of the digit you are rounding.
If the next digit (and all that follow) is 0, there is no issue.
If the next digit is 1, 2, 3 or 4 then ignore them.
If the next digit is 6, 7, 8, or 9 then add one to the digit that you are rounding.
If the next digit is 5 you can go either way. So as not to introduce a bias, you should round up half the time and round dwon half the time. The conventional solution, used by many statisticians, is to round up or down so that the previous digit is (or becomes) even.
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How does making small groups help estimate big numbers?
by rounding off the numbers
What number do you get when rounding off the numbers 39117?
The answer will depend on the degree of rounding. To the nearest ten, it is 39120 To the nearest million, it is 0.
Which is better rounding off to nearest ten or rounding off to nearest hundred?
There is no universal "better". Rounding off is a trade-off between reducing the accuracy and simplifying calculations. Also, if there are other numbers in an addition that are rounded to the nearest hundred, there is no point in rounding your number to the nearest ten.
What is a rounding off numbers?
Rounding a numerical value means replacing it by another value that is approximately equal but has a shorter, simpler, or more explicit representation.
How many whole numbers can be rounded off to 7000 when rounding off to the nearest thousand?
6500 to 749 9999 of them.
What are the steps in rounding off numbers?
steps rounding off number
What is better rounding off to nearest ten or rounding off to nearest hundred?
In whole numbers, rounding to the nearest ten is better. And in decimals, rounding to the nearest hundreth is more accurate.
Why is rounding off numbers important?
Rounding off is a important part of mathematics and a very handy tool for everyday life.
How you would estimate the product of greater numbers?
By rounding off.
How does making small groups help estimate big numbers?
by rounding off the numbers
What are the ideas where you can use rounding off numbers in real life?
your weight
What numbers can be rounded off to 750?
750.4 if rounding to the nearest whole number. 754, if rounding to the nearest 10. 774, if rounding to the nearest 50. 874, if rounding to the nearest 250.
What number do you get when rounding off the numbers 39117?
The answer will depend on the degree of rounding. To the nearest ten, it is 39120 To the nearest million, it is 0.
How do you round off the nearest litre?
You express your measurements in liters (convert, if necessary), then use the usual rules for rounding numbers.
Which is better rounding off to nearest ten or rounding off to nearest hundred?
There is no universal "better". Rounding off is a trade-off between reducing the accuracy and simplifying calculations. Also, if there are other numbers in an addition that are rounded to the nearest hundred, there is no point in rounding your number to the nearest ten.
What is the round off greatest value of 21987?
Rounding to different numbers of significant figures, the greatest result is 22,000.21 987 round off theto its greatest value what is answer.
What is a rounding off numbers?
Rounding a numerical value means replacing it by another value that is approximately equal but has a shorter, simpler, or more explicit representation.
