As there is a 6 in the ones position, we round up to give 1240 as the answer.
1236 is closest to 1240.
round 90 to the nearest ten
372 rounded to the nearest hundred is 400
300
100
100
100
10100
4198 to the nearest 100 = 4200
7675 rounded to the nearest 100 is 7700.
The answer is zero.