"Comparing the Size of Decimals" Preliminary Understanding of Decimals PPT Courseware 2

Description

"Comparing the Size of Decimals" Preliminary Understanding of Decimals PPT Courseware 2

learning target

In this lesson, we mainly study the comparison of decimals. Students should understand and master the method of comparing decimals based on actual examples. They should be able to apply this comparison method to compare decimals and solve related practical problems.

judge

Adding 0 or removing 0 from the end of a number will keep the size of the number unchanged.

Adding 0 or removing 0 after the decimal point will keep the size of the decimal unchanged.

Add "0" or remove "0" from the end of the decimal ( ).

①The decimal remains unchanged

②The counting unit remains unchanged

③The size of the decimal remains unchanged

④The counting unit for decimals has changed.

What should you pay attention to when comparing decimal sizes?

Let’s look at the integer part first. The number with the larger integer part is larger;

If the integer parts are the same, the decimal number with the larger number in the tenth place will be larger;

If the numbers at the tenth place are the same, compare the numbers at the percentile, and so on.

Summary

When comparing two decimals, compare the integer parts first. If the integer parts are the same, compare the decimal parts sequentially starting from the tenth place.

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"Comparing the Size of Decimals" PPT courseware for preliminary understanding of decimals:

"Comparing the Size of Decimals" Preliminary Understanding of Decimals PPT Courseware (1) 0.8 yuan is 8 jiao 1.2 yuan is 1 yuan 2 jiao 1 yuan 2 jiao is greater than 8 jiao () is more expensive. (2) 0.8 yuan is less than 1 yuan and 1.2 yuan is more than 1 yuan, so () is more expensive. (3) The integer part of 0.8 is 0, the 1.2...

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Update Time: 2024-11-22

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

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