how do you round??

Question

like i have no idea how to round things in math

Answer 1

Normally, when you round, you round up if the decimal is .5 or above, and down if its lower.

Ex: 3.5869 -> 4
8.274 -> 8
8.5 -> 9

In very strict rounding rules, when the decimal is exactly .5 (right in the middle) you always round to the even number. So in the above example, 8.5 would be rounded to 8, not 9. However, this rule isn't used by many, and many math and science teachers don't even know it, so they may mark your answer incorrect.

Here's more information on rounding than you'll ever need to know:

Answer 2

A general rule of thumb would be 4 and under round down, 5 and over round up.

Example: 5.3 = 5
37.45 = 37.5
66.981 = 66.98
32.9648752 = 33 or 32.96 or 32.965 or 32.9649

You don't always have to round to the nearest whole number. You can also round to the nearest tenth or hundredth or whatever. Note the last 3 examples. :)

Answer 3

rounding is usually done when your answer is a decimal. IF the number after the decimal is 5 or more, you round up. Example 4.5 would become 5. 3.2 would become 3 8.9 would be 9 and so on. If there are 2 places after the decimal you use the same principle. 4.75 would be 5 3.21 would be 3 8.91 would be 9..etc

Answer 4

if the number is a 5 you round up
if the number is a 4 you round down

Answer 5

Example: if you have a decimal like 1.4...you would round it down to 1.0 if the decimal was 1.6...you would round it up to 2.0....

Anything under.5 rounds down to nearest whole number, anything between .5 and .99 gets rounded up to nearest whole number

another example: $1.21 gets rounded down to $1.00 if dealing in dollars only....where $1.78 would get rounded up to $2.00 if dealing in dollars only.

Hope this helps

Answer 6

If it's .4 and lower you ignore the decimal so 7.4 will be 7

If it's .5 and higher you raise the number , so 7.5 will be 8

Answer 7

Really Easy.

To "round up" you just take the first higher integer.
Eg: 3.7 rounded up is 4

To "round down" you take the first lower integer
Eg: 3.7 rounded up is 3

To "Round" you round to the nearest integer, with anything .5 or higher going up, anything .5 or lower going down. So

3.0 rounds to 3
3.1 rounds to 3
3.2 rounds to 3
3.3 rounds to 3
3.4 rounds to 3
3.5 rounds to 4
3.6 rounds to 4
3.7 rounds to 4
3.8 rounds to 4
3.9 rounds to 4
4.0 rounds to 4

Answer 8

You have juste to do

if x is your number then

Round(x)=E(x)+E( (2*[x-E(x)]) ) where E(x) in entire part of x.