Fangfang made 14 flowers, and Jingjing made 10 flowers. Fangfang, how many flowers did you give Jingjing? Are they the same?
We use a pendulum method to solve this problem: there is a small magnetic buckle indicating the number of flowers made by Fangfang and a large magnetic buckle indicating the number of flowers made by Jingjing. Fangfang made a flower of 14, so we put a small magnetic buckle of 14, and Jingjing made a flower of 10, so we put a small magnetic buckle of 18 instead of a small flower, in order to make it easier to see that Fangfang has more flowers than Jingjing. Then we use the dotted line to divide Fangfang's flowers into two parts, one is as many as Jingjing, and the other is more than Jingjing. Then we divide the extra part into two parts, that is, we divide the four flowers into two, and then give two of them to Jingjing, so that they have as many flowers.
Let me explain it with a picture again. Mark Fangfang's flowers with circles and triangles respectively. Let's draw the flowers made by Fangfang, one two three four five six seven eight nine, 1 1234, and then use triangles to represent the flowers made by Jingjing. In order to see more parts of Fangfang than Jingjing more easily, we must pay attention to one-to-one correspondence when drawing. The number of Jingjing Flower is1234567,890.
We use dotted lines to divide Fangfang's flowers into two parts, one is as many as Jingjing, and the other is more than Jingjing. Then we divide the extra part into two parts, that is, divide the four flowers into two parts and give two of them to Jingjing, so that both of them become 12 flowers, that is, the number of flowers is the same. In fact, whether posing or painting, we always take some from more to less, so that the flowers of two people become the same. Mathematically, this method is called doing more and making up less. We have gone through three steps in solving the problem of shifting more and making up less. The first step is to mark how much more than less. The second step is to divide the extra into two equal parts. The third step is to give them less and make them the same. How about my explanation? Have you all learned? Please make valuable suggestions. Thank you for your suggestions. I will improve.