"Properties of Decimals" PPT courseware on the meaning and properties of decimals

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"Properties of Decimals" PPT courseware on the meaning and properties of decimals

1. Create situations and raise questions

Question: How much do the 2.50 yuan and 8.00 yuan here represent?

What is the relationship between 2.50 yuan and 2.5 yuan, 8.00 yuan and 8 yuan?

Presumption: Students may use the relevant knowledge of yuan, angles and minutes to explain:

2.50 yuan means 2 yuan, 50 cents and 2.5 yuan means 2 yuan and 50 cents, so they are equal.

2. Explore the properties of decimals

(1) Compare the sizes of 0.1m, 0.10m and 0.100m

Question: 1. Use a ruler and three 1m long paper strips on the table to measure 0.1m, 0.10m and 0.100m long paper strips respectively and mark them.

2. Compare the measured lengths of the three pieces of paper and tell us what you found.

Monitor: The three paper strips measured are equal in length.

(2) Compare the sizes of 0.3 and 0.30

Questions: 1. Express 0.3 and 0.30 respectively on two square pieces of paper and compare their sizes.

2. Feedback communication: Tell us what you have discovered.

(3) Discover patterns and draw conclusions

Question: What patterns did you discover from the above examples?

Summarize and derive the properties of decimals: adding "0" or removing "0" from the end of a decimal will keep the size of the decimal unchanged.

3. Connect with life and consolidate nature

(1) Solving problems in life

(2) Knowledge comparison to reveal the truth

Question: 1. Why does the size of the number change when "0" is added or removed from the end of an integer, but the size of the number remains unchanged when "0" is added or removed from the end of a decimal?

Monitoring: With the help of the digit sequence table, it is revealed that the 0 at the end of the integer cannot be added or removed.

2. Why can’t the “0” in the middle of the decimal be added or removed at will?

Monitoring: explained with the help of digital sequence table.

Summary: Emphasize that if you add "0" or remove "0" from the end of the decimal, the size of the decimal will remain unchanged; the end of the decimal is different from the end of the decimal point.

4. Assign homework

Homework: Exercise 10, question 3 on page 41.

Keywords: Courseware on the meaning and properties of decimals, PPT courseware for the second volume of the fourth grade of the New People's Education Press, fourth grade mathematics slide courseware download, PPT courseware download on the meaning and properties of decimals, .ppt format

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"Properties of Decimals" The meaning and properties of decimals PPT courseware 4:

"Properties of Decimals" The Meaning and Properties of Decimals PPT Courseware 4 Teaching Objectives In this lesson, we mainly study the properties of decimals. Students must initially understand the properties of decimals through group cooperative learning; be able to use the properties of decimals to simplify correctly and rewrite decimals. 0...

"Properties of Decimals" The meaning and properties of decimals PPT courseware 3:

"Properties of Decimals" The meaning and properties of decimals PPT courseware 3 Teaching objectives 1. Knowledge objectives: Preliminarily understand the properties of decimals through group cooperative learning; be able to use the properties of decimals to correctly simplify and rewrite decimals. 2. Ability goal: Cultivate everyone to use flexibly...

"Properties of Decimals" Decimal PPT Courseware 3:

"Properties of Decimals" Decimal PPT Courseware 3 Teaching Objectives In this lesson we mainly study the properties of decimals. Students will understand and master the properties of decimals based on actual examples and be able to solve related practical problems. 1. Simplify 0.70 and 105.0900 0.70= ( ) 105..

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Update Time: 2024-10-31

This template belongs to Mathematics courseware People's Education Press fourth grade mathematics volume 2 industry PPT template

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