| Category | Format | Size |
|---|---|---|
| Western Normal University Edition Fifth Grade Mathematics Volume 2 | pptx | 6 MB |
"Using Letters to Represent Numbers" Equations PPT Courseware
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 on the Equations PPT Use Letters to Represent Numbers PPT tag.
"Using Letters to Represent Numbers" Simple Equations PPT Courseware (Lesson 4):
"Representing Numbers with Letters" Simple Equations PPT Courseware (Lesson 4) Part One: Exciting Introduction This large glass of juice has a total of 1200 g, and I poured 3 small cups. If each small cup of juice is x g, can you use a formula containing letters to express how many grams of juice are left in the large cup? root..
"Using Letters to Represent Numbers" Simple Equations PPT Courseware (Lesson 3):
"Using Letters to Represent Numbers" Simple Equations PPT Courseware (Lesson 3) Part One: Exciting Introduction We have learned some arithmetic laws, can you express them with letters? ... ... ... Use letters to represent numbers PPT, part 2: knowledge explanation. If you use a...
"Using Letters to Represent Numbers" Simple Equations PPT Courseware (Lesson 2):
"Representing Numbers with Letters" Simple Equations PPT Courseware (Lesson 2) Part One: Exciting Introduction Xiaoxiao has 5 stamps, and her father is 6 times as many as hers. How many stamps does her father have? 65=30 (pieces) Answer: Dad has 30 pieces. To find out how many times a number is, use multiplication...
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Update Time: 2024-07-01
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