"Simple Application" Ratio and Proportion PPT Courseware 2

Description

"Simple Application" Ratio and Proportion PPT Courseware 2

teaching objectives

1. Combined with specific examples, experience the process of comprehensively applying the knowledge of ratio and proportion to solve proportional calculation problems.

2. Be able to comprehensively use the knowledge of ratio and proportion to solve proportional calculation problems.

3. Experience the process of communicating algorithms with others and be able to explain the rationality of methods and results.

review review

32：4＝0.8：x 0.3：x＝3：5

When preparing glucose injection with glucose powder, the mass ratio of glucose powder and water is 1:9.

Looking at the picture above, what do you notice?

Solution: Suppose x kilograms of water need to be added.

1/9=8.5/x

x＝8.5×9

x=76.5

Answer: 76.5 kilograms of water need to be added.

practice

1. How much does it cost to buy a 13-meter ribbon?

Solution: Suppose it costs x yuan to buy a 13-meter ribbon.

x/13=9/6

6x＝9×13

x=19.5

Answer: It costs 19.5 yuan to buy a 13-meter ribbon.

2. Use chemicals and water to prepare a pesticide. The mass ratio of chemicals and water is 1:10.

(1) To prepare 275 kilograms of this pesticide, how many kilograms of chemicals and water are needed?

(2) How many kilograms of water need to be added to prepare this pesticide using 7.5 kilograms?

(3) How many kilograms of this pesticide can be prepared using 500 kilograms of water?

Keywords: ratio and proportion teaching courseware, simple application teaching courseware, Hebei Education Edition sixth grade mathematics volume PPT courseware download, sixth grade mathematics slide courseware download, ratio and proportion PPT courseware download, simple application PPT courseware download, .PPT format;

For more information about the "Simple Application of Ratios and Proportions" PPT courseware, please click the Simple Application of Ratios and Proportions ppt tab.

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Update Time: 2024-11-26

This template belongs to Mathematics courseware Hebei Education Edition Sixth Grade Mathematics Volume 1 industry PPT template

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