"Approximate Values ​​of Quotient" Decimal Multiplication and Division PPT Courseware

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"Approximate Values ​​of Quotient" Decimal Multiplication and Division PPT Courseware

Use the "rounding" method to find approximate numbers:

43.9095 reserved integer is ( )

43.9095 accurate to tenths is ( )

43.9095 to two decimal places is ( )

43.9095 accurate to the thousandth is ( )

Exact and approximate numbers:

Accurate numbers: Among the numbers encountered in daily life and actual production, sometimes completely accurate numbers can be obtained. They are precise and have no errors. For example, there are 46 students in a certain class, and 46 here is the exact number.

Approximate numbers: Because in practice it is often not necessary to use precise numbers to describe a quantity, or it is impossible to obtain precise numbers. For example: China has about 1.3 billion people. The 13 here is an approximate number.

To find the approximate value of the quotient, generally divide to one more decimal place than the number of decimal places that need to be retained, and then use the "rounding" method to obtain the approximate value of the quotient.

1. Calculate each of the following questions (keep the quotient to one decimal place).

14.36÷2.7

8.33÷6.2

1.7÷0.03

2. Calculate each of the following questions (accurate to percentile).

32÷42

1.25÷1.2

2.41÷0.7

3. Calculate the following questions vertically (keep the results to the percentile).

5.63÷6.1 2.84×0.03

4.2÷4.5 0.382×0.13

6.64÷3.3 38.2÷2.7

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"Approximate Values ​​of Quotient" Decimal Division PPT Courseware 4:

"Approximate Values ​​of Quotient" Decimal Division PPT Courseware 4 Xiao Wang walked a total of 2.19 meters in 6 steps. How many meters is the average length of each step? 2.1960.37(m) Answer: The average step is about 0.37 m. Teacher Guo walked a total of 5.72 meters in 8 steps. How many meters is the average step? 5.7280.72(m..

"Approximate Values ​​of Quotient" Decimal Division PPT Courseware 3:

"Approximate Values ​​of Quotient" Decimal Division PPT Courseware 3 Oral Calculation. 2.4 2 = 0.56 7 = 0.10.05 = 0.360.12 = 7.2 0.9 = 1 0.25 = Use the rounding method to find the approximate number: 43.9095 The retained integer is ( ) 43.9095 The tenth place is ( ) 43..

"Approximate Values ​​of Quotient" Decimal Multiplication and Division PPT Courseware 2:

"Approximate Values ​​of Quotient" Decimal Multiplication and Division PPT Courseware 2 1. Calculate the following questions orally. 0.3+0.77= 0.50.5= 0.1-0.01= 1000.06= 0.213= 4.30.02= 0.3510= 0.8+5.2= ... ... ... Practice 1. Determine whether to use the further method or the next method for each of the following questions. .

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Update Time: 2024-10-03

This template belongs to Mathematics courseware Jiangsu Education Edition Fifth Grade Mathematics Volume 1 industry PPT template

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