Two people in a room, each can get 1/2 melons. When a person comes in with a melon in his hand, everyone can get 2/3 melons. Here comes another person with a melon in his hand, and everyone can get 3/4 melons. And so on. Everyone has many melons. You can use it to add or subtract the same number from the denominator of the numerator at the same time and compare it with the original value, so as to achieve the purpose of scaling. The melon splitting theorem is also a very basic inequality scaling method. Also known as "sugar water with sugar water is sweeter". For example, refer to 20 14 National Volume II Science Mathematics 17.