"Abdication and Reduction" PPT courseware

Description

"Abdication and Reduction" PPT courseware

Beijing has 56 votes and Paris has 18 votes. How many fewer votes does Paris have than Beijing?

Pay attention to the following when calculating abdication subtraction in vertical format:

1. Is the single digit enough to be reduced? What should I do if it is not enough?

2. After the tens digit is reduced by 1, how much should be subtracted from the ones digit?

3. After the tens place is reduced by 1, how much should be subtracted from the tens place?

First determine whether to abdicate in each of the following questions, and then say what the tenth digit of the difference is.

Are the following calculations correct? Correct the mistakes.

Give it a try, you can use a stick to help.

43-25= 72-27= 35-8=

80-61= 67-39= 58-9=

When filling in which numbers in the box, this question is subtraction without abdication? When filling in which numbers, it is abdicated subtraction?

This courseware fully demonstrates the relevant knowledge points about subtracting two-digit numbers from two-digit numbers and helps teachers better complete undergraduate teaching. It is a good classroom teaching aid.

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For more information about the PPT courseware "Addition and subtraction within 100, two-digit subtraction by two-digit numbers", please click the Addition and subtraction within 100 ppt, two-digit subtraction by two-digit ppt tag.

"Abdication" PPT:

"Abdication and Reduction" PPT Part One Content: New Lesson Introduction How many more votes did Beijing get than Paris? 56 - 18 = 38 (votes) Use a stick to swing it and try to calculate it vertically. Use the vertical form to calculate like this: How is the 3 in the tens place calculated? It is 5, borrow one digit and then subtract 1 to get...

"Don't Abdicate" PPT:

"Don't Abdicate" PPT Part One Content: Course Introduction How many more votes did Beijing get than Toronto? 56 - 22 = 34 (votes) Try the math yourself. 56 - 20 = 36 36 - 2 = 34 It can also be calculated like this: 50 - 20 = 30 6 - 2 = 4 30..

"Subtraction without Abdication" PPT courseware for subtraction within 20:

"Subtraction without abdication" PPT courseware for subtraction within 20. Teaching objectives 1. In the process of hands-on operation and attempted calculations, learn the calculation method of subtracting numbers from tens. 2. Be able to calculate more than ten subtractions without abdication. 3. Actively participate in mathematics activities and be able to boldly put your...

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Update Time: 2024-10-03

This template belongs to Mathematics courseware People's Education Press Second Grade Mathematics Volume 1 industry PPT template

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