| Category | Format | Size |
|---|---|---|
| People's Education Press Second Grade Mathematics Volume 2 | pptx | 6 MB |
"Addition and Subtraction of Hundreds and Thousands" PPT courseware download
Description
"Addition and Subtraction of Hundreds and Thousands" PPT courseware download, 27 pages in total.
learning target
Master the oral arithmetic methods of adding and subtracting hundreds and thousands, and be able to choose appropriate methods for oral arithmetic. (emphasis)
Able to correctly calculate orally the addition and subtraction of whole hundreds and whole thousand by advancing (retreating) digits. (difficulty)
Review import
Oral calculation.
9+6= 11-4= 17-9=
30＋40= 80－30= 90－20=
Explore new knowledge
Addition and subtraction of whole hundreds and whole thousand without advancing (removing) digits
(1) Help grandpa calculate how much it cost to buy these two electrical appliances.
Method 1: Calculate using the composition of numbers
Method 2: Think about addition of numbers within 10
Method 3: Dial with a counter or abacus
(2) How much more expensive is a refrigerator than a TV?
Knowledge refining
Calculation method for addition and subtraction of whole hundred and whole thousand without advancing (returning) digits: first add and subtract the numbers before 0, and then add the same number of 0s at the end of the resulting number as the end of the whole hundred or whole thousand.
Consolidation exercises
1. (Selected from textbook P97 T1) Mouse-catching competition.
2. (Selected from textbook P97 T2) Guilin has beautiful scenery and welcomes people from all over the world.
3. (Selected from textbook P97 T3)
Class summary
Calculation method for addition and subtraction of whole hundred and whole thousand without advancing (returning) digits: first add and subtract the numbers before 0, and then add the same number of 0s at the end of the resulting number as the end of the whole hundred or whole thousand.
Calculation method of addition and subtraction of whole hundred and whole thousand numbers: (1) Treat whole hundreds and whole thousand numbers as hundreds and thousands, and then add and subtract them. (2) You can ignore the 0s at the end of hundreds and thousands. First add and subtract the numbers before 0, and then add the same number of 0s at the end of the resulting number as the numbers at the end of hundreds and thousands.
Keywords: PPT courseware for addition and subtraction of hundreds and thousands, free download, PPT download for understanding numbers within ten thousand, .PPT format;
For more information about the PPT courseware "Understanding Numbers Within Ten Thousands, Addition and Subtraction of Hundreds and Whole Thousands", please click on the PPT tag of "Understanding Numbers Within Ten Thousands, Addition and Subtraction of Whole Hundreds and Whole Thousands".
File Info
Update Time: 2024-07-04
This template belongs to Mathematics courseware People's Education Press Second Grade Mathematics Volume 2 industry PPT template
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