what is the estimate and answer for 9 - 3 7/8

The answer is 4 if you round it

Easy, round them into whole numbers,

change them into whole numbers:

9 - - - >9

and

3 7/8 can be changed into 4. (3 7/8 is almost 3 8/8 - - - >4)

9-4=5

5 is your estimate.

Now,

9 - 3 7/8

9 changes into 8 8/8 to be able to subtract

8 8/8

-

3 7/8

=

5 1/8

These are your answers. 5 and 5 1/8.