"Basic Properties of Fractions" The Meaning of Fractions PPT

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"Basic Properties of Fractions" The Meaning of Fractions PPT

Part One: Classroom Introduction

1. Preliminarily understand and master the basic properties of fractions, and know the connection between the basic properties of fractions and the rule that the quotient does not change in integer division.

2. Be able to use the basic properties of fractions to convert fractions with different denominators into fractions with the same denominator and unchanged magnitude.

3. Let students realize the intrinsic connection between mathematical knowledge and feel the value of learning mathematical knowledge.

PPT on the basic properties of fractions, part 2: exploration of new knowledge

1.100÷50=

2. (100×5)÷(50×5)=

3. (100÷10)÷(50÷10)=

Recall, what property is this using we have learned?

If the dividend and divisor are multiplied or divided by the same number (except 0) at the same time, the quotient remains unchanged. This is called the law of constant quotient.

Can you represent the colored parts of the coloring as fractions?

Compare the colored parts of the three pictures. What can you find?

By comparing the three pictures, the sizes of the colored parts are equal, so the sizes of the three fractions are also equal.

Can you express the colored parts as fractions? Can you get an equal set of fractions?

Observe what are the characteristics of this set of equal fractions?

When the numerator and denominator of a fraction change, the size of the fraction remains the same.

Basic Properties of Fractions PPT, Part 3: Classroom Exercises

1. Apply and fill.

2. Fill in the appropriate numbers in the brackets.

4/7=8/( ) 3/40=9/( )

4/( )=48/60 8/12=( )/( )

3. Please tell me the fraction that is equal to 3/9.

Basic Properties of Fractions PPT, Part 4: Class Summary

Basic properties of fractions: If the numerator and denominator of a fraction are multiplied or divided by a non-zero number at the same time, the magnitude of the fraction remains unchanged.

Use the basic properties of fractions to convert a fraction into a fraction with a specified denominator (or numerator) without changing the size.

Basic properties of fractions PPT, Part 5: Classwork

1. Convert 5/6 and 1/4 into fractions whose denominator is 12 and whose magnitude remains unchanged.

2. Convert 2/3 and 3/4 into fractions whose molecule is 6 without changing the size.

3. In the picture below, first fill in the fractions that are equal to 1/4, then find another set of equal fractions and write them in the corresponding positions in the picture.

4. If you add 2 to the numerator of 2/5, how much should you add to the denominator to keep the size of the fraction unchanged?

The denominator should be added to 5! Because the numerator is doubled by adding 2 to become 4, the denominator is also doubled.

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Update Time: 2024-10-05

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