"Solution to Proportion" Proportion PPT download

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"Solution to Proportion" Proportion PPT download

Part One: Review Import

Apply the basic properties of proportion to complete the following questions.

( ):4=2:8

7.2:( )=0.9:1.25

24:9=8: ( )

64:( )=16:2

Solving Proportions PPT, Part 2: Exploring New Knowledge

The height of the Eiffel Tower in Paris, France is about 320m. There is a model of the Eiffel Tower in the World Park in Beijing. The ratio of its height to the height of the original tower is 1:10. How many meters tall is this model?

Model height: actual height=1:10

Solution: Let the height of this model be xm.

x:320=1:10

10x=320×1

x=320×1÷10

x=32

Answer: The height of this model is 32m.

step:

1. Write the word "Jie" first.

2. When rewriting a proportion in the form of a ratio into an equation, the product containing x is generally written on the left side of the equal sign.

3. Solve the equation.

According to the basic properties of proportions, if any three terms in a proportion are known, the other unknown term in the proportion can be found.

Finding the unknown terms in a ratio is called solving the ratio.

Solving Proportions PPT, Part 3: Corresponding Exercises

1. Solve the proportions.

2. To disinfect tableware in a restaurant, 100ml of disinfectant should be used to prepare disinfectant water. If the ratio of disinfectant to water is 1:150, how many milliliters of water should be added?

Solution: Suppose x ml of water should be added.

100:x=1:150

x=150×100

x=15000

Answer: 15000 ml of water should be added.

Solving Proportions PPT, Part 4: Class Summary

1. Finding the unknown terms in the ratio is called solving the ratio.

2. Methods for solving proportions: (1) Convert the proportion into a multiplication formula, that is, an equation, based on the basic properties of proportion; (2) Solve the equation to find the value of the unknown term.

Solving Proportions PPT, Part 5: Consolidation Practice

1. Solve the proportions.

2. The volume ratio of water and ice with the same mass is 9:10. What is the volume of a piece of ice with a volume of 50dm3 when it turns into water?

3. List the proportions according to the following conditions and solve the proportions.

(1) The ratio of 5 to 8 is equal to the ratio of 40 to x.

Solving Proportions PPT, Part Six: Expansion Exercises

1. Teacher Li bought 6 footballs and 8 basketballs, and the money spent on the two kinds of balls was equal.

(1) What is the ratio of the unit prices of football and basketball?

(2) The unit price of football is 40 yuan. What is the unit price of basketball?

(3) Can you ask and answer other mathematical questions?

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For more information about the "Proportions and Solutions to Proportions" PPT courseware, please click on the Proportions PPT and Solutions to Proportions PPT tab.

"Solution to Proportion" Proportion PPT:

"Solving Proportions" Proportion PPT Part One: Learning Introduction 1. Experience the process of solving proportions, understand the meaning of solving proportions, master the methods of solving proportions, and learn to solve proportions. (Key Points) 2. Be able to correctly solve proportions based on the basic properties of proportions or the meaning of proportions. (Disaster..

"Solution to Proportion" Proportion PPT Courseware 2:

"Solving Proportions" Proportion PPT Courseware 2 According to the basic properties of proportion, if any three terms in the proportion are known, the other unknown term can be found. Finding the unknown terms in a ratio is called solving the ratio. ... ... ... The Eiffel Tower is 320 meters high. It is not only an absorbing...

"Solution to Proportion" Proportion PPT courseware:

"Explaining Proportions" Proportion PPT courseware 1. Explore new knowledge The Eiffel Tower in Paris, France is about 320m tall. There is a model of the Eiffel Tower in the World Park in Beijing. The ratio of its height to the height of the original tower is 1:10. How many meters tall is this model? 1. Read the question and understand...

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Update Time: 2024-11-15

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