"Wide Angle of Mathematics - Reasoning" PPT (Lesson 1 Simple Reasoning)

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"Wide Angle of Mathematics - Reasoning" PPT (Lesson 1 Simple Reasoning)

Part One: Learning Objectives

1. Through activities such as observation and guessing, students can experience a simple reasoning process, understand the meaning of logical reasoning, and gain some simple reasoning experience.

2. Ability to organize information through connections and make inferences using certain methods.

3. In the process of simple reasoning, cultivate students' preliminary abilities of observation, analysis, reasoning and methodical mathematical expression.

[Key Points] Master simple reasoning methods.

[Difficulty] Initial cultivation of students' ability to think about problems and express mathematics in an orderly and comprehensive manner.

Simple reasoning PPT, part 2: classroom analysis

The teacher brought a book from "Classic Storybook" and "Science World" today. Can you guess which book it is?

cannot.

There are three books on Chinese, Mathematics and Morality and Life. Each of the following three people will take one. What book did Xiaogang take? Where is Xiaoli?

Read the question carefully. What do you know?

I know that there are three books on Chinese, Mathematics and Morality and Life. Xiaohong, Xiaoli and Xiaogang each get one.

How should we think about this?

Analysis: We already know that Xiaohong is holding a Chinese language book.

I also know that Xiaoli didn’t take the math book, but she must have taken the moral and life book.

Then, Xiaogang must have taken a math book.

Simple reasoning PPT, the third part: analysis of examples

1. Huanhuan, Lele and Xiaoxiao are three cute puppies. Lele is heavier than Huanhuan, and Xiaoxiao is the lightest. Can you write their names?

Lele is heavier than Huanhuan, and Xiaoxiao is the lightest.

Xiaoxiao is the lightest, so it weighs 5kg.

Lele is heavier than Huanhuan, so Lele weighs 9 kilograms and Huanhuan weighs 7 kilograms.

The one that weighs 7 kilograms is ( ), the one that weighs 5 kilograms is ( ), and the one that weighs 9 kilograms is ( ).

2. Xiaodong, Xiaoyu and Xiaowei are in classes one, two and three respectively. Xiaowei was in Class 3, and Xiaoyu went to Class 1 to play with Xiaodong after class. What shift do Xiaodong and Xiaoyu work in each?

Oral answer: Xiaodong is in Class 1 and Xiaoyu is in Class 2.

3. The following three students shot the ball 32 times, 31 times, and 30 times respectively. How many shots did each of them take?

I'm not the most.

I took 30 shots.

Oral answer: Xiaojuan took 31 shots, Xiaolong took 32 shots, and Xiaoyun took 30 shots.

4. Xiaoyu, Xiaodong, and Xiaosong compete in a rope skipping competition. Xiaosong said: "I'm not the last one." Xiaodong said: "I'm not the last place either, but Xiaosong's score is better than mine." Where did they each get?

Oral answer: Xiaosong won the first place, Xiaodong won the second place, and Xiaoyu won the third place.

Xiaosong said: "I am not the last one." Xiaodong said: "I am not the last one either, but Xiaosong has better grades than me."

To solve reasoning problems, you can use the elimination method to judge.

Simple Reasoning PPT, Part 4: Classroom Exercises

1. Choose one.

(1) Three good friends like to play chess, dance, or play the piano respectively. It is known that A cannot play chess or play the piano; C always needs to think quietly, and B likes ().

①Play chess ②Dance ③Play the piano

(2) There are 3 plates of fish on the table. The little cat said: "The first plate has 3 more fish than the third plate." The big cat said: "The third plate has 5 less fish than the second plate." The ( ) plate has the least fish .

①One ②Two ③Three

(3) Xiaojie, Xiaoli and Xiaobing wore two red hats and one blue hat. Xiaojie saw one person wearing a red hat and one person wearing a blue hat. Xiaojie is wearing a ( ) hat.

①Red ②Blue ③Unable to determine

(4) Xiaoqiang, Xiaoqing and Xiaoling are shorter than each other. Xiaoqiang is not the shortest but shorter than Xiaoqing. Xiaoling is not as tall as Xiaoqing and not as tall as Xiaoqiang. Among the three of them, ( ) is the tallest.

①Xiaoqiang ②Xiaoqing ③Xiaoling

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Update Time: 2024-11-22

This template belongs to Mathematics courseware People's Education Press Second Grade Mathematics Volume 2 industry PPT template

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