數學問題

sheepiedad

I think your math question can only be solved when it is an addition which I believe you already know the answers.

Unless it is some sort of 'IQ' test (not math question) , X - X is always equal to zero. It cannot be 7, 4, 5 or 8.

Cheers

原帖由 purplebb 於 09-10-11 16:15 發表
A B C D
-A B C D
7 4 5 8

問A=?, B=?, C=? D=?