| Category | Format | Size |
|---|---|---|
| Mathematics Volume 2, First Grade of Beijing Normal University | pptx | 6 MB |
"Skipping Rope" Addition and Subtraction PPT Courseware 2
Description
"Skipping Rope" Addition and Subtraction PPT Courseware 2
How many more times does Xiaohong jump than Xiaoliang?
40-28＝?
What should I do if there are no beads on the ones position?
One bead in the tens place is equivalent to 10 beads in the ones place.
Answer: Xiaohong jumps 12 times more than Xiaoliang.
Can you do the math in vertical form?
The 4 in the tenth place borrowed the 1, leaving 3.
Borrow 1 for 10
10-8=2
Subtracting 8 from 2 in the ones place is not enough, so borrow 1 from the tens place to make it 10.
3 on the tenth place is borrowed and 1 is left with 2
2-2=0
The highest bit 0 is not written
Summary
How to calculate two-digit subtraction and two-digit subtraction
1. Align the same digits.
2. Subtract from the single digit.
3. If the ones digit is not enough to subtract, retreat 1 from the tens digit, add 10 to the ones digit, and then subtract.
Keywords: rope skipping courseware PPT, Beijing Normal University edition first-grade mathematics second volume PPT courseware download, first-grade mathematics slide courseware download, rope skipping PPT courseware download, .PPT format
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Update Time: 2024-07-05
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