Eight teachers from the fourth grade of Huadu Primary School led 172 students to an autumn outing. Each of them had to bring a bottle of mineral water. One bottle of mineral water in the supermarket was 2 yuan, and they bought five for one free. If they bought it collectively, they only had to pay a little money.

在《Eight teachers from the fourth grade of Huadu Primary School led 172 students to an autumn outing. Each of them had to bring a bottle of mineral water. One bottle of mineral water in the supermarket was 2 yuan, and they bought five for one free. If they bought it collectively, they only had to pay a little money.》上留下第一个评论

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