"Mixed Operations of Addition and Subtraction of Fractions" Addition and Subtraction of Fractions PPT

Description

"Mixed Operations of Addition and Subtraction of Fractions" Addition and Subtraction of Fractions PPT

Part One: Learning Objectives

1. Through teaching, students can master that the commutative law of integer addition and the associative law are also applicable to fractions.

2. In the process of exploring knowledge, cultivate students’ abilities of knowledge transfer, analogy and induction and generalization.

3. Cultivate students’ habits of careful calculation and the ability to use simple and flexible methods to solve problems.

[Key Points] Understand and master the laws of integer operations that are still applicable to the addition of fractions.

[Difficulty] Perform simple operations of adding and subtracting fractions correctly and flexibly.

PPT on mixed operations of addition and subtraction of fractions, part 2: classroom introduction

Use simple algorithms to solve the following problems.

378+527+73 167+289+33 427+58-27

The above questions use the commutative law of addition and the associative law respectively.

Can the laws of whole number operations be used in addition and subtraction of fractions?

PPT on mixed operations of addition and subtraction of fractions, part 3: classroom exercises

1. Fill in the appropriate operation symbols in ○.

The calculation uses the commutative law of addition

The formula uses the associative law of addition

2. Use simple methods to calculate the following questions.

3. Connect.

4. Choose.

5. Fill in the appropriate numbers in the brackets to make the equation true.

Carefully observe what operation laws are used in each calculation.

PPT on mixed operations of addition and subtraction of fractions, part 4 content: Class summary

Simple operations for adding and subtracting fractions: The operational laws of adding integers are also applicable to adding fractions. The associative law of addition and the commutative law can be used at the same time.

PPT on mixed operations of addition and subtraction of fractions, Part 5: Classwork

1. Column calculation.

There are two ropes. The first one is 3/8 meter long and the second one is 1/5 meter shorter than the first one. How many meters are the total length of these two ropes?

Answer: The two ropes are 11/20 meters long in total.

2. Calculate.

3. Solve the problem.

Spring is here, and the farmer uncle watered the fruit trees. He watered 2/5 of all the fruit trees in the morning on the first day, 3/8 in the afternoon, and 1/5 in the morning of the second day. What fraction of the trees were watered in total?

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For more information about the PPT courseware "Addition and Subtraction of Fractions and Mixed Operations of Fractional Addition and Subtraction", please click the Addition and Subtraction of Fractions PPT Mixed Operations of Fractions Addition and Subtraction PPT tag.

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Update Time: 2024-11-22

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

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