"Constants and Variables" PPT courseware

Description

"Constants and Variables" PPT courseware

Part One: Introduction of New Course

On October 15, 2003, my country's "Shenzhou" 5 manned spacecraft was successfully launched. After orbiting the earth 14 times, the spacecraft's return capsule successfully returned to the ground at 6:23 on October 16. The following are relevant records during the return capsule of the "Shenzhou" spacecraft No. 5:

(1) How many minutes does it take for the return capsule of the "Shenzhou 5" spacecraft to return to the ground? During this time, how many meters did the altitude of the return capsule drop?

(2) During which period of time did the spacecraft return capsule land the fastest? During which period of time did the spacecraft return capsule land at the slowest speed?

(3) Which quantities are involved in the above table? Do the values ​​of these quantities remain unchanged or continue to change during this change process?

A car is driving on the highway at a speed of 90km/h. Let t represent the time it travels (h) and s represent the distance it travels (km).

(1) Write an expression using t to represent s.

(2) According to the value of t, fill in the corresponding value of s.

(3) What are the quantities involved in this problem? Among them, which quantities remain constant, and which quantities can take on different values?

Constants and variables PPT, part 2: exercises

The height of the trapezoid is 10, and the length of the lower base is twice the length of the upper base. Let the length of the upper base be x and the area of ​​the trapezoid be S.

(1) Please write an expression using x to represent S.

(2) Please indicate the constants and variables in this problem.

Keywords: Free download of Hebei Education Edition mathematics PPT courseware for eighth grade volume 2, constants and variables PPT download, .PPT format;

For more information about the "Constants and Variables" PPT courseware, please click the Constants and Variables ppt tab.

"Constants and Variables" PPT courseware:

"Constants and Variables" PPT courseware Part One: New Lesson Introduction On October 15, 2003, my country's Shenzhou 5 manned spacecraft was successfully launched. After orbiting the earth 14 times, the spacecraft's return capsule successfully returned to the ground at 6:23 on October 16. Below is the return of the Shenzhou 5 spacecraft...

"Constants and Variables" PPT:

"Constants and Variables" PPT Part One Content: Learning Objectives 1. Through examples, let students understand the meaning of constants and variables, and be able to cite constants and variables in reality. 2. Develop students’ abstract thinking and symbols by exploring the relationship and change patterns between two quantities..

File Info

Update Time: 2024-09-08

This template belongs to Mathematics courseware Hebei Education Edition Eighth Grade Mathematics Volume 2 industry PPT template

Preview