What is 87 divided by 9 by estimating?

Answer 1

9.6667

Answer 2

It is 92/3.

With a little bit of effort you can work out the exact answer and do not need to estimate.

90/9 is 10.

But you want 87/9. The numerator is 3 less so the quotient will be 3/9 less. Now, 3/9 = 1/3. So the exact answer is 10 minus 1/3 which is 92/3. Not that hard, was it?