0
Wiki User
11
The first digit is 1, in the tens place. So the front end estimate is 10.
The estimated answer is 11000.
The front-end digit of 5.28 is 5.
200 + 20 = 220
23
It is the 9.
2
8
It is 9.
9
200 + 400 = 600
8000 + 3000 = 11000