222.48 . In other words, it's already rounded to the nearest cent.
8.09
To the nearest unit: none (other than itself) To the nearest 5: 5 (incl itself) To the nearest 10: 10 (incl itself) To the nearest n: n, where n is any integer.
346,759 Ten thousand digit is 4 6 is to the right. It is 5 or greater and therefore the 4 is rounded to 5 and the other numbers are changed to zeroes. 350,000
290
This question is impossible to solve because a sum is when numbers are added together. The question would have to be 6552 plus some other number. But if you are asking what 6552 rounded to the nearest 100 is, then your answer is 6600.
540
2.7 is already at the nearest tenth, so there is no need for any other rounding.
This all depends what you are rounding up or down by. The nearest whole number would be 580. The nearest tens place would also be 580. If you were rounding it to the nearest hundred it would be 600 and the nearest thousand would be 1,000.
160
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.
It is 5.445: no other number can get nearer.