"The Meaning and Reading and Writing Methods of Decimals" Preliminary Understanding of Decimals PPT Courseware

Description

"The Meaning and Reading and Writing Methods of Decimals" Preliminary Understanding of Decimals PPT Courseware

Import new lesson

We have learned some numbers in the past, such as 0, 1, 2, 3, 4, 10, 100, 1000, etc. What are these numbers?

I have also learned some numbers, such as 0.1, 0.2, 0.13, 2.56, etc. What are these numbers?

teaching objectives

Let students know the generation and meaning of decimals, and deepen students' understanding of the concept of decimals.

Enable students to know the names and order of decimal digits, know the counting units of decimals and the progression rate between adjacent units, and understand the composition of decimals.

It can be expressed in decimals. The integer part is 7 centimeters, and the decimal part is 3 millimeters, which can be written as 0.3 centimeters, so the length of the line segment is 7.3 centimeters.

practice

1. There are ( ) 1s and ( ) 0.1s in 5.2.

2. 6.3 is ( ) 0.1, and 0.63 is ( ) 0.01.

3. The number composed of 4 100s and 8 0.01s is ( ).

4. If the hundreds, tenths, and percentiles of a number are all 5, and the other digits are all 0, this number is ( ).

Class summary

How to read decimals: read the integer part first, then read the decimal point according to the integer reading method, and finally read the decimal part. In the decimal part, read each number in sequence, and read as many 0s as there are.

How to write decimals: Write the integer part first, then write the decimal point, and finally the decimal part: When writing the decimal part, write each number in sequence, and write as many 0s as there are.

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"The Meaning and Reading and Writing Methods of Decimals" Preliminary Understanding of Decimals PPT Courseware 3:

"The Meaning and Reading and Writing Methods of Decimals" Preliminary Understanding of Decimals PPT Courseware 3 1 yuan = 100 points 1 point is 1/100 of 1 yuan, and can also be written as 0.01 yuan; 5 points is 5/100 of 1 yuan, and can also be written as 0.05 yuan; 40 cents and 8 cents is 48/100 of 1 yuan, and can also be written as 0.48 yuan. .....

"The Meaning and Reading and Writing Methods of Decimals" Preliminary Understanding of Decimals PPT Courseware 2:

"The Meaning and Reading and Writing Methods of Decimals" Preliminary Understanding of Decimals PPT Courseware 2 When measuring and calculating, it is often not possible to get exactly the result of an integer, so decimals are often expressed. Divide the integer 1 evenly into 10 parts, 100 parts, 1000 parts... one or more parts like this...

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Update Time: 2024-09-09

This template belongs to Mathematics courseware Jiangsu Education Edition Third Grade Mathematics Volume 2 industry PPT template

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