8
millions
There is no underlined digit in the question.
Which one is it
8,204,528,204
Nine billion.
8
millions
Count off the eleventh digit from the right.
There is no underlined digit in the question.
2
Which one is it
4539684357321 rounded to the nearest billion is 4540000000000. Look to the digit right of the billions, hundred millions. The hundred millions digit is 9. When rounding anything less than five you round down. When rounding anything five or more you round up. 9 is more than five so you round up to 0, making all the digits to the right 0 too.
The billions place is.
8,204,528,204
A zero should be in the billions place
Sometimes it is advantageous to express a value in round numbers. To round to a particular place, look at the digit immediately to the right of the one you want to round to, in this case, the hundred billions place. If that digit is 4, 3, 2, 1 or 0, zero it and everything to the right of it out. If that digit is 5, 6, 7, 8 or 9, increase your target digit by one and zero everything to the right of it out. If your target digit is 9, it will become a zero and increase the digit to the left of it by one.