| Category | Format | Size |
|---|---|---|
| People's Education Press Second Grade Mathematics Volume 1 | pptx | 6 MB |
"Addition, Subtraction and Mixing" PPT courseware
Description
"Addition, Subtraction and Mixing" PPT courseware
1. Fill in the blanks.
1. When doing addition and subtraction in writing, the same digits must be ( ),
Start by adding and subtracting from the ones digit.
If the two digits add up to ten, advance to the tens digit ( ). If a
If the number is not reduced enough, it will be moved back from the tens position ( ).
2. Vertical calculation.
36+28+17= 65-25-21＝
Consolidation exercises.
1. Use vertical calculation.
52＋29－38＝ 65－28＋17＝
The Stars Chorus originally had 52 members. Nine students have graduated and 15 new members have joined. How many members are there now?
Class summary:
In the vertical position, the same digits must be aligned, if there is not enough subtraction, they must step aside, and if the sum reaches ten, they must carry.
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For more information about the PPT courseware "Addition and subtraction within 100, continuous addition, continuous subtraction, and mixed addition and subtraction" PPT courseware, please click the Addition and subtraction ppt within 100, continuous addition, continuous subtraction, and mixed addition and subtraction ppt tags.
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File Info
Update Time: 2024-07-03
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