Give examples of where division, addition and subtraction will be used in life (give more than one example of each method).

There are 2 1 candy, which are distributed to three students, and each student is divided into several parts on average (division).

In the morning, my mother gave me 10 yuan today. At noon, because of my good behavior, my sister gave me another 5 yuan. How much do I have now (addition)?

I have 30 yuan. I spent 1 1 on a notebook and 8 yuan on a pen. How much money do I have now? (subtraction)