The hundred that's nearest to 45 is zero.
45 is only 45 away from that one.
The next one ... 100 ... is 55 away.
300
100 100
To round 97 to the nearest 100, you need to look at the digit in the tens place, which is 9 in this case. Since 9 is greater than or equal to 5, you will round up. Therefore, 97 rounded to the nearest 100 is 100.
200
96 round to the nearest ten=100
372 rounded to the nearest hundred is 400
300
45 + 39 = 84, so if you want to round to the nearest ten, that's 80, or nearest hundred is 100. Otherwise, it doesn't turn out to a decimal, so it doesn't need rounding to the nearest one.
100 100
100
10100
500
4198 to the nearest 100 = 4200
The answer is zero.
It is: 50
45 cents
100.