Use estimation and rounding to choose the appropriate answer for each problem:
The first bus had 96 passengers, and the second bus had 107 passengers. There are about       passengers in total.

The correct answer is: 200

Passengers in 1^st bus = 96
Passengers in 2^nd bus = 107
Rounding to its nearest hundreds place, we get
1^st bus passengers = 100
2^nd bus passengers = 100
Then, the total passengers in both the buses = 100 + 100 = 200.