A Busy Lift!Read and decide how many peopie got of the lift

A Busy Lift!
Read and decide how many peopie got of the lift on the seventh floor.Make notes as you read so that you can work out the answer.
The lift arrived at the first floor with no one in it.When the doors opened,four women,two men and two children got in.On the second floor,both the men and one of the children got out and one woman got in.On the third,no one got out but three men got in.On the fourth floor,four women got out.On the fifth floor,a man,a woman and a child got out and two women and three children got in.The lift didn't stop at the sixth floor.When it reached the seventh floor,eberyone got out.
How many people got out on the seventh floor?
When it reached the seventh floor,everyone got out.
那个 everyone 拼错了 见谅~
紫荆恋人 1年前 已收到1个回答 举报

泪冲咖啡 幼苗

共回答了16个问题采纳率:100% 举报

答案是7.

1年前 追问

6

紫荆恋人 举报

为什么?

举报 泪冲咖啡

第一层 4+2+2 第二层 -2-1+1 第三层 +3 第四层 -4 第五层 -1 -1-1+2+3 第六层 0 第七层 =7
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