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Primary school mathematics thinking expands the second semester of grade two, and clever and interesting questions show their talents. Question 12: How to do it
1

Conversion type

This is a way of thinking to solve problems when encountering obstacles. It is to change the problem from one form to another when the problem is blocked, making the problem simpler and easier to solve. In teaching, this kind of training can greatly improve students' problem-solving ability.

2

System type

This is an advanced holistic thinking form, which considers things or problems as a system from different levels or different angles. In addition to comprehensive application problems, senior three can also compile many intellectual training questions to cultivate students' systematic thinking ability.

three

Enhanced type

This is a jumping, lively and highly transferable thinking form. Teachers can train students through quick questions and answers.

For example, what is the sum of three fives? Students answer: 5+5+5 = 15 or 5×3= 15. The teacher asked again: What is the product of three fives? Student's answer: 5×5×5= 125. Then ask: What is the product of 3 and 5? Answer: 3×5= 15, or 5×3= 15. Through this quick question-and-answer training, it is found that students' thinking is more and more active, flexible and accurate.

four

Analogy type

This is a form of thinking to identify the similarity and essence of parallel things. This kind of training can cultivate the accuracy of students' thinking. For example:

(1) Jinhu Grain Store delivered 6 tons of rice. 1/4 tons is less than the flour shipped. How many tons of flour were shipped?

② Jinhu Grain Store delivered 6 tons of rice, less than the flour delivered 1/4. How many tons of flour were delivered?

Although the above two questions are similar, they are different in essence, and the word difference and solution are completely different, which can guide students to analyze themselves. Through training, students will carefully scrutinize similar problems in the future, which greatly improves the accuracy of solving problems.