"Basic Properties of Ratios and Simplified Ratios" Understanding Ratios PPT Courseware Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
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"Basic Properties of Ratios and Simplified Ratios" Understanding Ratios PPT Courseware
teaching objectives
1. Knowledge and skills: enable students to understand and master the basic properties of ratios in real-life situations, be able to apply the meaning and basic properties of ratios to find ratios and simplify ratios, and master the methods of simplifying ratios.
2. Process and methods: Experience the abstraction process of the concept of ratio and the process of exploring the basic properties of ratio, accumulate experience in mathematical activities, and further understand the intrinsic connection between mathematical knowledge.
3. Emotional attitudes and values: In the process of using ratios to describe life phenomena and solve simple practical problems, everyone can enhance their awareness of independent exploration and cooperation and communication, and improve their self-confidence in learning mathematics; understand that the ratio of the length and width of the national flag is 3 �2. This is clearly stipulated by national law, and we know the seriousness of making a national flag.
If the first and last terms of a ratio are multiplied or divided by the same number (except 0) at the same time, the ratio remains unchanged. This is the basic property of ratio.
By applying the basic properties of ratios, some ratios can be converted into the simplest integer ratios.
Invariable properties of quotient
In division, the dividend and divisor are multiplied (or divided) by the same number (except 0) at the same time, and the quotient remains unchanged.
Basic properties of fractions
If the numerator and denominator of a fraction are multiplied (or divided) by the same number (except 0) at the same time, the magnitude of the fraction remains unchanged.
Fill in the appropriate numbers in the brackets.
8∶5 = 32∶( )
15∶25 = 3∶( )
Simplify the following comparisons.
20:8
36:2
102/68
Summary of this lesson
Understand and master the basic properties of ratio, and be able to apply the meaning and basic properties of ratio to calculate ratios and simplify ratios.
Understand the "golden ratio", the ratio of the flag's length to its width
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"Basic Properties of Ratios and Simplified Ratios" Flash animation courseware on ratios and proportions:
"Basic Properties of Ratios and Simplified Ratios" Flash Animation Courseware for Ratios and Proportions This courseware is a teaching material for the second unit of the sixth grade mathematics volume of the Hebei Education Edition Basic Properties of Ratios and Simplified Ratios Flash Animation Courseware, with vivid content , please download! Key words:..