To round 483 to the nearest 100, you look at the digit in the tens place, which is 8 in this case. Since 8 is greater than or equal to 5, you would round the hundreds place up by 1. Therefore, 483 rounded to the nearest 100 would be 500.
To the nearest ten, 480
500
491-500
372 rounded to the nearest hundred is 400
300
100
10100
4198 to the nearest 100 = 4200
The answer is zero.
100.
200
95,96,97,98,99 round them up to the ten, all 100 to the 100, all 100.