What is the estimate of 3113?

Answer 1

The front end estimate is 3000. But estimating a single number, in isolation and without context, is a complete waste of time. It all comes down to the context of what needs to be done with the number.

If I had to add 3113 to 1 trillion, I would estimate it as 0.
If I had to add 3113 to 0.0000000001, I would use the number as given, or possibly the front end estimate. If I had to divide it by 3, I would estimate it as 3120, because 3120/3 = 140. If I had to divide it by 10, I would estimate it as 3110, because 3110/10 = 311.

Answer 2

To the nearest hundred, 3100