Question

What is the estimate of the sum of 125, 123, 392 and 294 using front end estimation?

Answer 1

Front end estimation for this question would be to the nearest hundred. So 125 rounded to the nearest hundred is 100, 123 to the nearest hundred is 100, 392 to the nearest hundred is 400, and 294 to the nearest hundred is 300. Adding 100 + 100 + 400 + 300 would be 900.
---
Hope this helps!

Answer 2

100+100+400+300=900
So your answer is 900. 
Just round each number to the nearest hundredth and add them up. 
For example, is 125 closest to 100 or 200. 100 would be the answer.
I hope this helps!