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

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

Part One: Learning Objectives

1. Further explore and understand the meaning of multiplying fractions and integers, and be able to calculate correctly.

2. Further consolidate the calculation method of multiplying fractions and integers.

3. Be able to solve practical problems of multiplying simple fractions and integers.

[Key Points] Be able to correctly calculate the multiplication of fractions and integers, and further consolidate the calculation method of multiplication of fractions and integers.

[Difficulty] Solve practical problems of multiplying simple fractions and integers.

Fraction multiplication PPT, part 2: exploration of new knowledge

The third grade students went to plant trees. The boys planted 20 trees. The number of trees planted by the girls was 3/4 of the boys. How many trees did the girls plant?

20×3/4=(20×3)/4=15 (trees)

Answer: Girls plant 15 trees.

Can you give another similar example?

We girls planted 20 trees.

Boys plant 1/4 more trees than girls.

How many more trees do boys plant than girls? Draw a picture and tell me how you understand it.

Multiplication of Fractions PPT, Part 3: Classroom Exercises

1. On the first day of the National Day holiday, 15 tourists came to the rural farmyard, and the number of tourists on the second day was 2/5 more than the first day. How many more tourists came on the second day than on the first day?

(1) Draw a picture, talk about how you understand it, and solve the problem in parallel.

Answer: There were 6 more tourists on the second day than on the first day.

(2) Can you give any other similar examples? Communicate with peers.

There are 28 boys in the third grade of a certain primary school. There are 1/14 more girls than boys. How many more girls than boys?

Answer: There are 2 more girls than boys.

2. Naughty and Qisi are both stamp collectors. Naughty has collected 63 stamps of various kinds. Qisi has collected 2/9 less stamps than Naughty. How many stamps has Qisi collected less than Naughty? Please draw a diagram first and then do the calculations.

63×2/9=(63×2)/9=14 (pieces)

Answer: Qisi has 14 stamps less than Naughty.

3. A road was built. On the first day, 360 meters were built. On the second day, it was 1/8 more than the first day. How many meters more was built on the second day than on the first day?

360×1/8= (360×1)/8=45 (meters)

Answer: On the second day, 45 meters more was built than on the first day.

Fraction Multiplication PPT, Part 4: Class Summary

1. To find out what fraction of a number is, multiply the number by the fraction.

2. Calculation method of multiplying fractions by integers: The product of the numerator and the integer is used as the numerator, the denominator remains unchanged, and the sum that can be reduced is reduced to the simplest fraction.

Multiplication of Fractions PPT, Part 5: Classwork

1. Two little rabbits pulled out radishes. The little white rabbit pulled out 48 radishes. The little gray rabbit pulled out 1/6 less radishes than the little white rabbit. How many fewer radishes did the little gray rabbit pull out than the little white rabbit?

Answer: The little gray rabbit plucked 8 fewer radishes than the little white rabbit.

2. Students from two classes of sixth grade helped repair books in the library. The first class repaired 48 books, and the second class repaired 1/6 less than the first class. How many copies did the second class repair?

48×1/6= (48×1)/6=8 (this)

48-8=40 (original)

Answer: The second class repaired 40 books.

3. Master Li processed a batch of parts. On the first day, he processed 150 parts. On the second day, he processed 2/5 more parts than on the first day. How many more parts were processed on the second day than on the first day?

150×2/5= (150×2)/5=60 (pieces)

Answer: 60 more parts were processed on the second day than on the first day.

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: 2024-11-17

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

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