949
It is 300, rounded to the nearest 200.
When rounding to a whole number, half of the numbers round up, half round down. Thus those with a fractional part 0.5 or greater round up, and those with a fractional part less than 0.5 round down. So the question becomes what is the largest two digit decimal less than 0.5? The smallest 2 digit decimal is 0.01 → 0.5 - 0.01 = 0.49 is the largest 2 digit decimal that can round down. → 3 + 0.49 = 3.49 is the largest 2 digit decimal number that rounds to 3 when rounded to the nearest whole number.
30
Rounded down to the nearest whole number, 30.089 is approximately equal to 30.
As the last digit is a 2, it will round down giving 64 as the answer.
It is 300, rounded to the nearest 200.
The largest number that will round up or down to 500 is 499.5. When rounding to the nearest whole number, 499.5 would round up to 500. Similarly, when rounding to the nearest ten, hundred, or thousand, 499.5 would also round to 500. Any number greater than 499.5 would round up to a number greater than 500.
When rounding to a whole number, half of the numbers round up, half round down. Thus those with a fractional part 0.5 or greater round up, and those with a fractional part less than 0.5 round down. So the question becomes what is the largest two digit decimal less than 0.5? The smallest 2 digit decimal is 0.01 → 0.5 - 0.01 = 0.49 is the largest 2 digit decimal that can round down. → 3 + 0.49 = 3.49 is the largest 2 digit decimal number that rounds to 3 when rounded to the nearest whole number.
30
You would round it down to 140.
4600
You can round up to 225 or down to 224.
To round to the nearest whole number the tenths digit (the one after the decimal point) is the deciding digit whether to round up or down - if it is less than 5 round down, otherwise round up. The tenths digit of 9.13 is 1 which is less than 5 so round down 9.13 → 9 to the nearest whole number.
8000
Well, honey, you can't magically turn 71.25 into a whole number. If you want a whole number, you gotta round that sucker up or down. So, if you round 71.25 down, you get 71. If you round it up, you get 72. But either way, you ain't getting a whole number out of 71.25 without some rounding action.
Since 3.75 cannot be expressed without using a decimal point or fraction bar, it is not an integer, and therefore is not a whole number and cannot be a whole number. However, it can be rounded up to 4, which is a whole number.
3.75 rounded to the nearest whole number is 4. When rounding to the nearest whole number, if the decimal is at the .5 mark or higher, round up. If it's less than .5 round down. So 3.5 would round up to 4, but 3.4 would round down to 3.