There is an important concept in the first-grade mathematics textbook of Qingdao edition called "move more and make up less" This concept is mainly through some practical examples to help students understand and master.

For example, a teacher may show his students two apples and three oranges, and then ask, "If we take one orange, will the number of apples and oranges be equal?" The student union replied, "No, because there are more oranges than apples."

Then, the teacher will ask, "If we take one from an apple, will the number of apples and oranges be equal?" The student union replied, "Yes, because there are two apples and oranges now."

This is the concept of "shifting more and supplementing less". In this way, students can better understand this concept and apply it to real life.

Thoughts on solving problems by shifting more and supplementing less

Find out which group has more by observing and comparing, and then divide the more part into two parts, one of which is the group with less supply, so that the number of objects in the two groups is the same. This is more action and less compensation. When solving the problem of moving more and making up less, it is necessary to find out under what circumstances it becomes the same, and the amount to be removed here is actually half of the difference, so as to solve the problem smoothly.

example

Wen Wen and Feifei each have some photos. After Feifei gave Wenwen three photos, they had the same number of photos. How many photos does Feifei have than Wenwen?

Mental navigation

According to the meaning of the title, "Fei Fei gives three paragraphs of text", that is, the number of movements of the two-person map is three, and the difference between the two-person map is that Fei Fei has more paragraphs than Wen Wen. Because the "difference" is twice as much as the "dynamic number", 3×2=6 (sheets), which is the difference between two people.

The formula is as follows:

3×2=6 (sheets)

It turns out that Feifei has six more than Wenwen.

Exercise 2

(1) Xiaohua gave Xiao Qiang two pencils, the number of which was the same. How many pencils does Xiaohua have than Xiao Qiang?

(2) There are 60 children in Class Two (1) who do exercises in two teams, and 4 children are transferred from Team One to Team Two. The number of people in the two teams is the same. How many people are there in Team One than Team Two?

(3) After Mix gave Feifei six sticks, the number of sticks was the same. How many sticks does Xiao Xiao have more than Feifei?