Only the sandwich pie got the first question right.

Let me talk about the problem-solving ideas:

First of all, the neighbors didn't earn or lose.

So what young people earn is equal to what boss Wang pays.

When the young people left, they took away gifts worth 18 yuan and cash from 79 yuan.

So 18+79=97.

The second question, freakout☆, Ru_Butterfly, and Nutrition Feast, all have similar solutions.

It is also correct.

increase

I didn't see it clearly just now

That 10 yuan is on one of the three people.

Because 250÷3 is inexhaustible.

So we can only divide +20 by 90.

And this 20 can only be taken from those three people.

So there is 10 yuan left.