"Number Axis" PPT Courseware 3

Description

"Number Axis" PPT Courseware 3

learning target:

1. Understand the meaning of the number axis, clarify the three elements of the number axis, and be able to draw the number axis correctly.

2. Be able to tell the number represented by a known point on the number line; be able to express rational numbers as points on the number line.

Self-learning

1. Read the textbook P31-32 carefully and underline what you think is important.

2. What is a number line? What are its three elements?

3. How to draw a number line? Please draw a number line.

4. (Group or table discussion) How to use points on the number line to represent numbers? (The focus is on how to use points to represent fractions or decimals on the number line)

Warm reminder: Rational numbers can be represented by points on the number line, but points on the number line do not necessarily represent rational numbers.

Method steps:

A. Draw a straight line;

B. Take a point on the straight line as the origin;

C. Select the appropriate length as the unit length as needed;

D. Determine the positive direction and indicate it with an arrow.

Kind tips:

(1) For the convenience of reading the graph, the number axis is usually drawn horizontally, but it does not mean that it must be horizontal.

(2) The origin can be chosen arbitrarily, usually at an appropriate position in the figure. For example, if all negative numbers are represented, the origin can be shifted to the right.

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"Number Axis" PPT courseware:

"Number Axis" PPT courseware learning objectives: 1. Know the definition of a number axis, and be able to draw a number axis; 2. Be able to represent known numbers on a number axis, and be able to tell the numbers represented by points representing rational numbers on the number axis; 3 .Use the number axis to solve related problems and summarize the combination of numbers and shapes..

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Update Time: 2024-10-23

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

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