"Using Letters to Represent Numbers" Equations PPT Courseware

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Western Normal University Edition Fifth Grade Mathematics Volume 2	pptx	6 MB

"Using Letters to Represent Numbers" Equations PPT Courseware

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Description

"Using Letters to Represent Numbers" Equations PPT Courseware

Use letters to represent numbers

They are all represented by some symbols or letters, such as ■, ▲, ● or �, x, n, m. These symbols and letters can be used to represent numbers.

The laws of operation, properties, calculation formulas... all use letters or symbols to represent numbers.

In mathematics we often use letters to represent numbers.

What other examples have you seen of using symbols or letters to represent numbers?

In expressions containing letters, the multiplication sign between the letters can be written as "·", or it can be omitted.

� ×b = b× �

It can be written as � · b = b · � or � b=b �

Use �, b, and c to represent three numbers respectively, and write other operation laws.

Summary

(1) The letter representation is concise, easy to remember and easy to apply.

(2) The multiplication sign can be expressed with "·" or omitted.

(3) Other arithmetic symbols between letters cannot be replaced by dots, nor can they be omitted.

Can you fill it out?

1 frog (1) mouth (2) eyes (4) legs

2 frogs (2) mouths (4) eyes (8) legs

3 frogs (3) mouths (6) eyes (12) legs

…

� frog (�) mouth (2 �) eyes (4 �) legs

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For more information about the PPT courseware "Equations Use Letters to Represent Numbers", please click the Equations PPT Use Letters to Represent Numbers ppt tag.

"Review of Representing Numbers with Letters" PPT:

"Review of Using Letters to Represent Numbers" PPT Part One: Teaching Objectives 1. Review and organize the knowledge about using letters to express numbers in primary school. Through review, students can use letters to represent numbers in specific situations. Ability to use letters to represent operational rules and calculations..

"Using Letters to Represent Numbers" PPT:

"Representing Numbers with Letters" PPT Part One Content: Scenario introduction 1 frog 1 mouth 2 frogs 2 mouths 3 frogs 3 mouths.. N frogs ( ) mouths Example 1. Use expressions containing letters to express Yaya and Niuniu age relationship. When Niuniu was 1 year old, Yaya (1+3...

"Using Letters to Represent Numbers" PPT Courseware 7:

"Representing Numbers with Letters" PPT Courseware 7 The unit price of exercise books is a yuan. How to express the total price of 100 exercise books? Because the total price of exercise books = the number of exercise books x unit price, the total price of 100 exercise books is 100xa yuan is 100a yuan. Numbers are related to the letters that represent numbers...

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Update Time: 2024-11-22

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Equation ppt Use letters to represent numbers ppt

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"Using Letters to Represent Numbers" Equations PPT Courseware