"Solution to Proportion" Proportion PPT courseware

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"Solution to Proportion" Proportion PPT courseware

1. Explore 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?

1. Read the question and understand its meaning: How do you understand “1:10”?

2. List a proportional formula based on the meaning of the question.

3. Solve for proportions.

4. Communicate within the group.

2. Application of knowledge

(1) Do it

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?

According to the meaning of the question, we can know: disinfectant: water = 1:150

It is known that the disinfectant solution is 100ml. If the added water is xml, the proportional formula 100:x=1:150 can be listed.

(2) Solve problems

1. On May 22, 2013, the price ratio of the Chinese sturgeon commemorative coin and the baiji dolphin commemorative coin was 2:3. The price of each Chinese sturgeon commemorative coin was 50 yuan. How much was the price of each baiji dolphin commemorative coin?

3. Assign homework

Homework: Exercise 18 on page 44, questions 8, 9, and 10.

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Update Time: 2024-11-21

This template belongs to Mathematics courseware People's Education Press Mathematics Volume 2 for Sixth Grade industry PPT template

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