"RMB Exchange" Decimal Division PPT Download

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"RMB Exchange" Decimal Division PPT Download

Part One: Classroom Introduction

1. Combined with the RMB exchange scenario, explore the relationship between the quotient and the dividend when the divisor is greater (or less than 1, or close to 1).

2. Be able to apply the discovered rules to estimate and calculate some decimal divisions.

3. Feel the close connection between mathematics and life, realize the necessity of learning mathematics, and increase the enthusiasm for learning mathematics.

RMB exchange PPT, part 2: introduction of new knowledge

How many RMB can be exchanged for 1.12.5 U.S. dollars? (1 U.S. dollar exchanges for RMB 6.31)

12.5×6.31≈78.88 (yuan)

The "rounding" method is used

Answer: It can be exchanged for RMB 78.88.

2. It takes 2.2 meters of cloth to make a set of children's clothing. How many sets of such children's clothing can be made with 30 meters of cloth?

30÷2.2≈13 (set)

The "tail removal method" is used

Answer: You can make up to 13 sets of such children's clothing.

3. How many such oil drums does mom need to hold 10kg of oil?

The "advancing method" is used

10÷4.5≈3 (pieces)

Answer: 3 such oil barrels are needed.

method 1

7.89÷100＝0.0789 yuan

5000÷0.0789≈63371.36 (Japanese yen)

Answer: It can be exchanged for about 63371.36 yen

Method 2

5000÷7.89≈633.7136 (Japanese yen)

633.7136×100＝63371.36 yen

Group work tasks:

1. Student No. 3 in each group corrects the answer, and other students listen and correct.

2. The team leader organizes team members to share their findings one by one, and other team members question and add.

3. Organize everyone’s findings and the recorder will take notes.

4. The reporter prepares the report.

RMB exchange PPT, Part 3: Classroom exercises

1. According to the rules learned, judge the size without calculation.

1.5÷1.1○1.5 3.5÷1○3.5

5.7÷1.2○5.7 1.25÷0.9○1.25

2. Think about it and fill it in

3. Do the math, what did you find? Please write another set of similar calculations.

It is found that: when the divisor is greater than 1, the quotient is less than the dividend; when the divisor is less than 1, the quotient is greater than the dividend; when the divisor is close to 1, the quotient is also close to the dividend; when the divisor is equal to 1, the quotient is equal to the dividend.

RMB exchange PPT, Part 4: Class summary

When the divisor is greater than 1, the quotient is less than the dividend; when the divisor is less than 1, the quotient is greater than the dividend; when the divisor is close to 1, the quotient is also close to the dividend; when the divisor is equal to 1, the quotient is equal to the dividend.

RMB exchange PPT, Part 5: Classwork

1. According to the exchange rate of 1 U.S. dollar to 6.31 yuan, Andy, an American teacher, works in China with a monthly salary of 5,000 yuan. How many U.S. dollars can be exchanged at the bank? (keep two decimal places)

5000÷6.31≈792.39 (USD)

Answer: It can be exchanged for US$792.39.

2. Think about it and do some calculations. What did you find through these two sets of calculations?

(1)24÷1.2

24÷1.2÷1.2

24÷1.2÷1.2÷1.2

(2)24÷0.8

24÷0.8÷0.8

24÷0.8÷0.8÷0.8

It is found that when the divisor is greater than 1, the more times the same divisor is divided, the smaller the quotient is; conversely, the larger the quotient is.

Keywords: Beijing Normal University edition fifth grade mathematics PPT courseware free download, RMB exchange PPT download, decimal division PPT download, .PPT format;

For more information about the "Decimal Division RMB Exchange" PPT courseware, please click the Decimal Division PPT RMB Exchange PPT tab.

"RMB Exchange" Decimal Division PPT:

"RMB Exchange" Decimal Division PPT Part One Content: Review Old Knowledge 1. Fill in the following equation completely according to the nature of constant quotient. 15.840.12＝( )12 17.250.75＝( ) 75 2. Vertical calculation. 3.1053= 20.029.1= 3..

"RMB Exchange" Decimal Division PPT Courseware 2:

"RMB Conversion" Decimal Division PPT Courseware 2 1 USD to RMB 6.31 yuan 1 euro to RMB 8.19 yuan 1 Hong Kong dollar to RMB 0.81 yuan 1 Singapore dollar to RMB 5.11 yuan 100 Japanese yen to RMB 7.89 yuan 100 baht to RMB 20.32 yuan... .

"RMB Exchange" decimal division PPT courseware:

"RMB Exchange" decimal division PPT courseware finds approximate numbers according to requirements: 828643 (accurate to thousands): 25252525 (accurate to tens of thousands): 30478 (accurate to hundreds): 7993900 ( ) 1999010000 ( ) billion wisdom tips: Use rounding..

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Update Time: 2024-11-08

This template belongs to Mathematics courseware Beijing Normal University Edition Fifth Grade Mathematics Volume 1 industry PPT template

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