Excuse me, master, how do you answer this question two times?

Question 1: There are 64 math stories in the school library, and 18 has been borrowed. How many books are there?

A: 64- 18=46 copies.

Question 2: There are 64 math stories in the school library, and 18 books have been borrowed. How many books were there before the library borrowed them?

A: 64+ 18=82 copies.

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