There is a topic that three people stayed in a hotel, paid 100 yuan, and then the waiter returned 15 yuan. Who knows how to calculate in the end?

Three people go to the hotel. The room rate for three rooms was 300 yuan, and each room was charged 100 yuan to the boss. The boss said that there was a discount on that day, and 250 yuan had enough, so he asked the waiter to return 50 yuan to three people. As a result, the waiter embezzled 20 yuan himself and returned the remaining 30 yuan to three people at the price of per person 10 yuan.

Well, the problem now is: everyone paid 100 yuan, and everyone paid back 10 yuan. That is to say, each of them paid 90 yuan, and the three of them paid 90 * * 3 = 270 yuan. Plus 20 yuan, a corrupt waiter always got 290 yuan. Why is 10 yuan missing? 1Where is 0 yuan?

Can't use 270+20 to calculate.

Because 270 yuan was the last money paid by the three of them, 20 yuan pocketed the money from the waiter, and 250 yuan was the last money the boss got.

The deal ended with the waiter: three people finally paid 270 yuan-the boss finally gave 250 yuan = 20 yuan to Xiao Er.

Take the boss as the end of the transaction: three people finally pay 270 yuan -20 yuan, and the waiter takes it for himself = 250 yuan, and the boss gets it.

Taking the customer as the end of the transaction: three people pay 300 yuan first-30 yuan paid by the waiter later (that is, the boss gave the waiter 50 yuan-20 yuan kept by the waiter) = 270 yuan paid by the customer last.