| Category | Format | Size |
|---|---|---|
| People's Education Press Second Grade Mathematics Volume 1 | pptx | 6 MB |
"Abdication and Subtraction" PPT download of addition and subtraction within 100
Description
"Abdication and Subtraction" PPT download of addition and subtraction within 100
Part One: Scenario Introduction
Based on this information, ask you to come up with a math problem that can be solved using subtraction.
How many more gold medals does China have than the United States?
How many fewer gold medals does the United States have than China?
Abdication minus PPT, part 2: independent exploration
51-36＝15 (pieces)
Is the single digit reduced enough? What should I do if the weight loss is not enough?
Subtracting 1 from the ones digit by 6 is not enough. Subtract 1 from the tens digit to get 10. Subtract 6 from 11 to get 5.
Answer: China has 15 more gold medals than the United States.
Step aside and reduce PPT, the third part: cooperative learning
50-24＝26
Is the single digit reduced enough? What should I do if the weight loss is not enough?
After stepping back from the tens place by 1, the tens place must be calculated as ( ) minus ( ).
Subtracting 4 from 0 in the ones digit is not enough. After retreating from the tens digit by 1, the ones digit must be calculated as ( ) minus ( ).
Abdicate and reduce PPT, the fourth part: summary and improvement
What should you pay attention to when doing subtraction?
Same digit alignment;
Decrease from single digit;
If the ones digit is not reduced enough, step back 1 from the tens digit.
Step aside and reduce PPT, part five: homework design
Question 4 of Exercise 3 on page 20 of the textbook
Keywords: Free download of PPT courseware for second grade mathematics from the People's Education Press, download of subtraction PPT, download of addition and subtraction within 100 PPT, .PPT format;
For more information about the PPT courseware "Addition and Subtraction Within 100, Subtraction with Reduction", please click on the Addition and Subtraction within 100 PPT, Subtraction with Reduction PPT tag.
"Abdication and Subtraction" PPT teaching courseware for addition and subtraction within 100:
"Abdication and Subtraction" PPT teaching courseware for addition and subtraction within 100. Part 1: Introduction of the topic 1. Calculate orally and talk about your own algorithm. 15-7= 20-8= 17-9= 13-7= 2. Based on the mathematical information in the picture, can you ask any mathematical questions about subtraction?...
"Abdication and Subtraction" PPT on addition and subtraction within 100:
"Abdication and Subtraction" PPT on addition and subtraction within 100 Part 1: Review introduction I am the best in verbal arithmetic. 16-8＝ 10-4＝ 15-7＝ 11-6＝ 12-8＝ 10-5＝ ... ... ... Abdication minus PPT, the second part: Scenario introduction China comparison...
"Subtraction without abdicating" PPT download of addition and subtraction within 100:
"Subtraction without Retreating" PPT Download of Addition and Subtraction Within 100 Part One: Learning Objectives 1. Understand the arithmetic of subtracting two-digit numbers from two-digit numbers in vertical forms without retreating. 2. Master the vertical writing method and be able to calculate correctly. 3. In the process of inquiry, develop learning...
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Update Time: 2024-07-31
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