"Using Letters to Represent Numbers" PPT Courseware 3

Description

"Using Letters to Represent Numbers" PPT Courseware 3

Independent learning (1)

Read Communication and Discovery on page 108 of the textbook to the top of Example 1 and answer the 3 questions in the textbook.

1. Simple and convenient

2. Representative

math games

1 frog, 1 mouth, 2 eyes and 4 legs, jumps into the water with a splash

2 frogs with 2 mouths, 4 eyes and 8 legs jump into the water with 2 plops

3 frogs with 3 mouths, 6 eyes and 12 legs jumped into the water with 3 plops

Can you finish this children's song? Can you express the content of the children's song in concise language?

Independent learning (2)

Read the questions in Example 1 on page 108 of the textbook and pay attention to the students' presentation methods.

Writing standards

1. To multiply numbers by letters, you can omit "×" or replace "×" with "●", and write the numerical factors in front of the letters.

2. If the number is a mixed number, it should be written as an improper fraction. (Supplementary content)

3. Divisions containing letters are written in the form of fractions.

4. When the result is in the form of sum or difference, the formula should be enclosed in brackets and the name of the unit should be written. (Supplementary content)

Note: When multiplying numbers by numbers, the "×" sign is generally still used.

Class summary

Let’s talk about it:

What did we gain from today’s lesson?

1. We can use letters to represent numbers

2. The advantage of using letters to represent numbers is: simplicity and convenience

3. Rules or issues that should be paid attention to when using letters to represent numbers

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

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File Info

Update Time: 2024-11-13

This template belongs to Mathematics courseware Qingdao Edition Seventh Grade Mathematics Volume 1 industry PPT template

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