"Opposite Numbers and Absolute Value" PPT courseware

Description

"Opposite Numbers and Absolute Value" PPT courseware

Opposite number

Two numbers with only different signs are called mutually opposite numbers.

One of the numbers is the opposite of the other number

The opposite of 0 is 0

What are the characteristics of mutually opposite numbers on the number line?

On the number line, two points representing mutually opposite numbers are located on both sides of the origin, and they are equidistant from the origin.

Point-to-point coaching:

1. Name the opposite of each of the following numbers respectively.

-3.5, 7, -8,

2. Fill in the blanks:

(1) The opposite of -3.2 is ______; the opposite of ____________ is -3.2;

(2)-______ and ______ are opposite numbers of each other; the opposite number of 0 is

(3)If a=13, then -a=_____

absolute value

On the number axis, the distance between the point representing a number a and the origin is called the absolute value of the number, denoted as �a�. It is read as the absolute value of a.

Are there any negative absolute values?

Point-to-point coaching:

1. Find the absolute value of each of the following numbers

2. On the number line, what number does a point 3 units long from the origin represent?

Variation 1. The absolute value of a number is 3, then the number is: 3 or -3

Variation 2. If |x|=3, then x=3 or -3

Definitely worth the geometric meaning

On the number axis, the distance between the point representing a number a and the origin is called the absolute value of the number, denoted as �a� and read as the absolute value of a.

The absolute values ​​of two numbers that are opposite to each other are equal

That is: |a|=|-a|

Two negative numbers, the negative number with a larger absolute value is smaller.

Keywords: Opposite numbers and absolute value teaching courseware, Qingdao edition seventh grade mathematics volume PPT courseware download, seventh grade mathematics slide courseware download, inverse number and absolute value PPT courseware download, .PPT format;

For more information about the "Inverse Numbers and Absolute Values" PPT courseware, please click on the "Inverse Numbers and Absolute Values" ppt tag.

"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: 2024-09-28

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

Preview