Here's an easy trick...
This is what my tutor taught. You simply that the all of the numbers you got in your decimal, put them backwards then subtract them by all of the numbers normally. So here's an ex. lets say you have 0.532569.
Take that and put it like this: 9652350-0532569.
When you get your response, just add back on the decimal. (That was for any rounding to the nearest whatever).
100.00
From the decimal, and going right each number holder following it is tenths, hundredths,thousandths and ten thousandths So, your hundredths place number is 8. The next number, if it is 5 or above, we will round our hundredth number of 8 up to 9. Yes, the next column to the right is 9 so we will round up the 8 to 9 and drop the rest of the digits. The answer is then 6.79, to the nearest hundredth.
6/7 and you cant reduce so its 6/7
42/2pi is 6.68inches
Since you haven't given us any data to work with - we cannot help you !
7.083 gives 7.08 to the nearest hundred.
If that's 43.926, it rounds to 43.93 If that's 43,926, it's already there. Punctuation is important.
100.00
From the decimal, and going right each number holder following it is tenths, hundredths,thousandths and ten thousandths So, your hundredths place number is 8. The next number, if it is 5 or above, we will round our hundredth number of 8 up to 9. Yes, the next column to the right is 9 so we will round up the 8 to 9 and drop the rest of the digits. The answer is then 6.79, to the nearest hundredth.
6/7 and you cant reduce so its 6/7
You take the radius (or diameter). If radius you times it by two (since it is half of the Diameter) then times the answer by 3.14. If diameter, times the diameter by 3.14. then round the decimals.
42/2pi is 6.68inches
Round 45,621 to the nearest place given. To the nearest ten
Since you haven't given us any data to work with - we cannot help you !
This depends what you are rounding it to. The nearest whole number would be 4 while the nearest tens place would be 0. You could also round the decimal point around as well.
For circumference, multiply the diameter by pi and round the product to the second decimal place. For area, multiply the square of the radius by pi and round the product to the second decimal place.
Done!