"Multiplication of Fractions (3)" Multiplication of Fractions PPT Courseware (Lesson 2)

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"Multiplication of Fractions (3)" Multiplication of Fractions PPT Courseware (Lesson 2)

Part One: Learning Objectives

1. In practical activities, further understand the estimation method of multiplying fractions by fractions.

2. Be proficient in estimating methods for multiplying fractions by fractions, and be able to correctly judge the size of products and multipliers.

3. Use the knowledge of multiplying fractions to solve simple practical problems and understand the connection between mathematics and life.

[Key Points] Be proficient in estimating methods of multiplying fractions by fractions, and be able to calculate correctly.

[Difficulty] Use the knowledge of multiplying fractions to solve simple practical problems and understand the connection between mathematics and life.

Fraction multiplication PPT, part 2: exploration of new knowledge

See who can calculate correctly and quickly.

1/8×6/7 7/24×6/5

4/9×7/6 8/25×5/4

To multiply two fractions, just multiply the numerator by the numerator and the denominator by the denominator. Offer points that can be reduced.

Lele believes that if a number is multiplied by a fraction, the product must be less than this number. Do you agree? Give examples to illustrate your ideas.

Do the math and look at the equations. What do you find?

When a number (except 0) is multiplied by a number less than 1, the product is less than this number. When multiplied by a number greater than 1, the product is greater than this number.

Without calculating, fill in “＞”, “＜” or “＝” in ( ) and tell us what you think.

When a number (except 0) is multiplied by a number less than 1, the product is less than this number; when multiplied by a number greater than 1, the product is greater than this number; when multiplied by a number equal to 1, the product is equal to 1.

Multiplication of Fractions PPT, Part 3: Classroom Exercises

1. Without calculation, directly fill in “＞”, “＜” or “=" in ( ).

2. The road construction team repaired 5/8 kilometers in the morning and 3/4 of the morning in the afternoon. How many kilometers did you complete this day?

5/8×3/4=(5×3)/(8×4)=15/32

15/32＋5/8=15/32＋20/32=35/32

3. There are 216 students in the third grade of Hope Elementary School. There are 2/9 more students in the fourth grade than in the third grade. How many more students are there in the fourth grade than in the third grade?

216×2/9=(216×2)/9=48 (people)

Answer: There are 48 more students in the fourth grade than in the third grade.

Fraction Multiplication PPT, Part 4: Class Summary

a number (other than 0),

Multiply a number less than 1, and the product is less than this number;

Multiply a number greater than 1, and the product is greater than this number;

Multiply a number equal to 1, and the product equals 1.

Multiplication of Fractions PPT, Part 5: Classwork

1. A square has a side length of 8/9 decimeters. What is its area in square decimeters?

8/9×8/9=(8×8)/(9×9)＝64/81

Answer: Its area is 64/81 square decimeters.

2. Fill in “＞”, “＜” or “=" in ( ).

3. A cup of water weighs 3/8 kg. How many kilograms does 2/3 cup weigh? What about 5/3 cup? Observing the calculation results, what did you find?

4. Honghong read a book. She read 3/8 of the whole book on the first day and 2/3 of the first day on the second day. Without counting, which day did she read more?

Keywords: Beijing Normal University edition fifth grade mathematics PPT courseware for volume 2 free download, fraction multiplication PPT download, .PPT format;

For more information about the "Multiplying Fractions" PPT courseware, please click the Multiplying Fractions PPT tab.

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Update Time: 2024-11-03

This template belongs to Mathematics courseware Beijing Normal University Edition Fifth Grade Mathematics Volume 2 industry PPT template

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