You tell us the problem and we'll help you solve it. But we don't have books (even if there are books, I'm afraid the answer has been accepted by the teacher). What can we do for you?

Answer (1)3/5, 2/3

(2)7/ 12

(3)3.333333 ... (If the second subtraction is the remaining 1/3, then the answer is 2.22222. ....

(4)64

(5) 12, 1/ 16