If you count this, everyone is a billionaire.
The method of mathematics is:
Yesterday, the monkey bought a small vest, which should be 10 yuan.
You should earn 10 yuan for returning the vest today.
You have to pay 15 yuan to buy another big vest.
15- 10=5, which should be paid to 5 yuan today.
Primary school mathematics multiplication and division teaching plan 1
Teaching objectives
1, so th