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!["The Meaning of Operation" PPT](http://daogebangong.oss-cn-beijing.aliyuncs.com/ppt/preview/1/e2ce6437-abd4-4919-8efe-5299f440c45f.webp)
Category | Format | Size |
---|---|---|
Hebei Education Edition Sixth Grade Mathematics Volume 2 | pptx | 6 MB |
Description
"The Meaning of Operation" PPT
Part One: Questions We Asked:
1. How many paper cranes did the two students fold in total?
How do you calculate it? Why?
39+26=65 (only)
Answer: Two classmates folded 65 paper cranes in total.
The meaning of addition: the operation of combining two or more numbers into one number.
2. How many more paper cranes do you want to fold?
How do you calculate it? Why?
120-65=55 (only)
Answer: I still need to fold 55 paper cranes.
The meaning of subtraction: knowing the sum of two numbers and one of the addends, find the operation of the other number.
The meaning of operations PPT, part 2: several situations where multiplication operations are used
1. To find the simple operation of the sum of several identical addends, use multiplication.
2. To find out how many times a number is, use multiplication.
3. To find out what fraction (or percent) of a number is, use multiplication.
4. Find the area, volume, etc. of geometric figures.
Give an example to illustrate the relationship between the various parts of addition:
2+8=10 8=10-2 2=10-8
Give an example to illustrate the relationship between the various parts of subtraction:
100-30=70 30=100-70 100=70+30
Minuend – Minuend = difference
Minuend = Minuend - Difference
Minuend = Difference + Minuend
The meaning of operations PPT, the third part: four arithmetic operations
In the four arithmetic operations, we should also pay attention to the following special situations:
a+0=( ) a×0=( ) 0÷a=( )
a-0=( ) a×1=( ) a÷a=( )
a-a=( ) a÷1=( ) 1÷a=( )
Calculate each of the following questions:
In the four arithmetic operations, we should also pay attention to the following special situations:
a+0=( ) a×0=( ) 0÷a=( )
a-0=( ) a×1=( ) a÷a=( )
a-a=( ) a÷1=( ) 1÷a=( )
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Update Time: 2024-09-09
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!["The Meaning of Operation" PPT](http://daogebangong.oss-cn-beijing.aliyuncs.com/ppt/preview/1/090e53c9-9303-4285-83e3-bfa79ae4ff80.webp)