there are 20 pages in jamals book he read 1/5 of the book how many pages did he read

He read 4 pages!

Does Adrik know how to figure that out?? Just to give the answer is not very helpful if you don't explain how you got that answer.

20/5

And how will you know that a 2nd grader (if he really is a 2nd grader!) will know what that means?

ryrw

6+3=9

I'm in 6th grade, the answer is 4, the reason is because, 20 divided by 4=5

and 5x4=20, so the answer is,4.