Tom had 6 books. He gave 2 to his sister and then purchased 3 more books at the bookstore. Which of the following mathematical e

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问题 Tom had 6 books. He gave 2 to his sister and then purchased 3 more books at the bookstore. Which of the following mathematical expressions is equivalent to the number of books that Tom now has?

选项 A、6-2 + 3
B、6 + 2-3
C、6(2 + 3)
D、6(2 - 3)

答案6-2 + 3

解析 You are given that Tom started out with 6 books. After he gave 2 books to his sister he was left with 6-2 books. He then purchased 3 more books, so he now has 6-2 + 3 books.

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