"The Meaning of Decimals" The meaning of decimals and addition and subtraction PPT courseware

Description

"The Meaning of Decimals" The meaning of decimals and addition and subtraction PPT courseware

teaching objectives

In this class, we mainly study the meaning of decimals. Students will understand the meaning of decimals through practical examples, be able to use decimals to represent some common quantities in life, and be able to solve related practical problems.

decimal decimal point

Numbers like 3.5, 1.06, 16.85,...are all decimals.

Think about it:

Divide "1" evenly into 1000 parts, one of which is ( ), which can also be expressed as ( ).

59 of them are ( ), which can also be expressed as ( ).

Divide "1" evenly into 10 parts, one or more parts of which can be expressed with one decimal place;

Divide it equally into 100 parts, one or more parts of which can be expressed with two decimal places;

Divide it equally into 1,000 parts, one or more parts of which can be expressed with three decimal places;

Summary

When making measurements and calculations, it is often not possible to obtain exactly integer results, so decimals are often used to express them.

Divide the integer 1 evenly into 10 parts, 100 parts, and 1,000 parts. Such a part or parts is a few tenths, a few hundredths, or a thousandths. The number written in the form of a denominator is called decimal.

1. Fill in the blanks

The 4 in 4.8 is in the ( ) position, meaning ( ) ( );

8 is in the ( ) position, indicating ( ) ( ).

The 2 in 0.25 is in the ( ) position, indicating ( ) ( );

5 is in the ( ) position, indicating ( ) a ( ).

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For more information about the PPT courseware "The Meaning of Decimals, the Meaning of Decimals and Addition and Subtraction", please click the "The Meaning of Decimals ppt" The meaning of decimals and addition and subtraction ppt tags.

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File Info

Update Time: 2024-10-05

This template belongs to Mathematics courseware Mathematics Volume 2 for Grade 4 of Beijing Normal University industry PPT template

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