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Category | Format | Size |
---|---|---|
People's Education Press Seventh Grade Mathematics Volume 1 | pptx | 6 MB |
Description
"Opposite Numbers" Rational Numbers PPT Courseware
think
There are ____ points on the number axis whose distance from the origin is 2, and the number represented by these points is _______; there are ____ points whose distance from the origin is 5, and the number represented by these points is __________
induction
Generally speaking, assuming a is a positive number, there are two points on the number axis whose distance from the origin is a. They are respectively on the left and right of the origin, which means -a and a. We say that these two points are symmetrical about the origin.
concept
Like 2 and -2, 5 and -5, -0.5 and 0.5, two numbers with only different signs are called opposites of each other.
That is to say, the opposite of 2 is -2, and the opposite of -2 is 2; the opposite of 5 is -5, and the opposite of -5 is 5.
Summary of teaching activities
1. Key knowledge: The concept of mutually opposite numbers: like 2 and -2, 5 and -5, two numbers with only different signs are called mutually opposite numbers.
2. Important mathematical ideas: the idea of combining numbers and shapes, and the idea of classification.
3. Developed skills: Ability to find the opposite of a number.
Keywords: Rational numbers courseware, opposite numbers courseware, New People's Education Edition seventh-grade mathematics PPT courseware, seventh-grade mathematics slide courseware download, rational numbers PPT courseware download, opposite numbers PPT courseware download, .ppt format
For more information about "Opposites of Rational Numbers" PPT courseware, please click on the "Opposites of Rational Numbers ppt" tag.
"Absolute Value and Negative Numbers" PPT Courseware 2:
"Absolute Value and Negative Numbers" PPT Courseware 2 Small test: state the meanings of the following and simplify them: (1)ㄧ2.3ㄧ=______ ㄧ7/4ㄧ=______ㄧ6ㄧ=______ (2)ㄧ -5ㄧ=______ ㄧ-10.5ㄧ=______ㄧ-7/4ㄧ=______ -5 opposite number..
"Absolute Value and Negative Numbers" PPT courseware:
"Absolute Value and Negative Numbers" PPT courseware Geometric meaning of absolute value On the number axis, the distance from the point representing a number to the origin is called the absolute value of the number. Teacher-student cooperation will test you and test your ability. What are the similarities and differences between the following sets of numbers? Please tell me...
"Opposite Numbers and Absolute Value" PPT Courseware 2:
"Opposite Numbers and Absolute Value" PPT Courseware 2 Learning Objective: With the help of the number line, understand the meaning of opposite numbers. Can find the opposite of a number. Key points and difficulties in learning: Key point: The concept of absolute value Difficulty point: Using absolute value to compare the size of two negative numbers Reviewing the past and learning the new...
File Info
Update Time: 2024-08-22
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