"Approximate Numbers" Large Numbers in Life PPT Courseware

Description

"Approximate Numbers" Large Numbers in Life PPT Courseware

teaching objectives

1. Experience the process of understanding approximate numbers and choosing appropriate approximate numbers to describe things.

2. Be able to use appropriate approximate numbers to describe things in real life; be able to choose appropriate accurate numbers based on the given approximate numbers.

3. Understand the application of approximate numbers in life and feel the close connection between mathematics and life.

Discuss

Are 1300 and 2230 accurate numbers of birds and flowers?

In real life, we often use a number that is close to the exact number, such as a whole ten, a hundred, a thousand... to describe some things. For example:

Why are the number of people in the same school represented by two different numbers?

3000 is an approximate number of 2904.

2904≈3000

Approximately equal sign is pronounced as: approximately equal to

1200 is an approximate number of 1213.

1213≈1200

Approximately equal sign is pronounced as: approximately equal to

In conclusion

A number that is close to the exact number (slightly more or less than the exact number) is called an approximate number of the exact number.

practice

1. Use appropriate approximate numbers to describe the following things.

2. Choose the appropriate answer based on the approximate numbers given.

3. Fill in the blanks.

4. Write the approximate number of each of the following numbers.

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"Approximate Numbers" PPT courseware 3:

"Approximate Numbers" PPT Courseware 3 August 1, 2006, 3 days, about 4.3 million yuan Do you think there is any difference between these numbers that appear in life? In life, we need not only accurate numbers but also approximate numbers! What methods have we learned to obtain approximate numbers? rounding..

"Approximate Numbers" PPT Courseware 2:

"Approximate Numbers" PPT Courseware 2 Among the numbers in the following practical problems, which are approximate numbers and which are precise numbers? Approximate number: A number that is very close to the actual number. Exact number: A number that exactly matches reality. 1. There are 55 students in the first grade of junior high school (1) 2. The radius of the earth is about 6370..

"Approximate Numbers" PPT courseware:

"Approximate Numbers" PPT courseware Learning objectives: Understand the concept of approximate numbers. Able to obtain approximate numbers as required and indicate the precise digits of the approximate numbers. Understand the application of approximate numbers in real life. Let students feel that mathematics comes from life and serves life. How do these numbers...

File Info

Update Time: 2024-10-03

This template belongs to Mathematics courseware Hebei Education Edition Third Grade Mathematics Volume 1 industry PPT template

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