"Approximate Numbers of Quotient" Decimal Division PPT Courseware

Description

"Approximate Numbers of Quotient" Decimal 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.

Significant digits: To which digit an approximate number is accurate, counting from the first non-zero number on the left to this digit, all numbers are called the significant digits of this number. For example: 0.6166≈0.62, there are two valid figures: 6, 2.

Further method:

Now there are 32 tons of apples. If Dongfeng cars can only transport 5 tons at a time, how many times will it take to transport 32 tons of apples?

When shipping goods, whatever is left of the last shipment must be shipped. Therefore, in this case, the "further method" needs to be used. It takes 7 cars to complete the distance.

Tail removal method:

There are currently 60 feet of fabric. To make a set of clothes, 16 feet of fabric are needed. How many sets of clothes can be made from 60 feet of fabric?

Because 0.75 meters of cloth cannot be made into a set of clothes. Therefore, the "rounding" method cannot be used to approximately equal 4. We can only take the approximate number 3.

This courseware provides a comprehensive introduction to the approximate numbers of quotients through small games and exercises, which improves students' interest in learning and helps students better understand and remember the knowledge points of decimal division. It is a good classroom teaching courseware.

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"Approximate Quotient Numbers" Decimal Division Flash Animation Courseware:

"Approximate Quotient Numbers" Decimal Division Flash Animation Courseware This animation courseware includes review, new lessons, exercises, etc. to help students understand and apply the knowledge they have learned. It fully demonstrates the knowledge points of decimal division "Approximate Quotient Numbers" and is A great teaching aid. ..

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Update Time: 2024-07-03

This template belongs to Mathematics courseware People's Education Press Fifth Grade Mathematics Volume 1 industry PPT template

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