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People's Education Press Seventh Grade Mathematics Volume 1 | pptx | 6 MB |
Description
"Positive and Negative Numbers" Rational Numbers PPT Courseware 3
Does 0 just mean none?
1. The number of gold coins in the empty jar;
2. 0℃ in temperature;
3.Height of sea level;
4. Standard water level;
5. The benchmark for height comparison;
6. The boundary between positive and negative numbers;
...0 is just a benchmark, it has rich meanings, it does not simply mean nothing.
Example (2) In 2001, the changes in the total merchandise import and export volume of the following countries compared with the previous year were: the United States decreased by 6.4%, Germany increased by 1.3%, France decreased by 2.4%, the United Kingdom decreased by 3.5%, Italy increased by 0.2%, and China increased by 7.5% %. Write down the growth rate of the total import and export of goods in these countries in 2001
Solution: The growth rate of total merchandise imports and exports of six countries in 2001:
United States -6.4%, Germany 1.3%,
France -2.4%, UK -3.5%,
Italy -0.2%, China 7.5%.
Summarize
How to use positive and negative numbers to represent quantities with opposite meanings?
A positive number is used to represent a quantity of one meaning, and the other quantity is represented by a negative number; in particular, when a positive or negative number represents the amount of change in a specified direction, the amount of change in the specified direction is usually defined as a positive number, and the amount of change in the specified direction is usually defined as a positive number. The amount of change in the opposite direction to the specified direction is specified as a negative number.
Keywords: Rational numbers courseware, positive and negative numbers courseware, New People's Education Edition seventh grade mathematics PPT courseware, seventh grade mathematics slide courseware download, rational numbers PPT courseware download, positive and negative numbers PPT courseware download, .ppt format
For more information about the "Positive and Negative Rational Numbers" PPT courseware, please click on the "Positive and Negative Numbers ppt Rational Numbers ppt" tab.
"Positive and Negative Numbers" PPT courseware:
"Positive and Negative Numbers" PPT courseware Self-introduction: My name is Liu Qing, I am 1.6cm tall, 30 years old, and weigh 51.5 kg. There are boys in our class. Which numbers appeared in the introduction just now? Can you classify them according to the number classification methods you have learned before? Integers and fractions..
"Positive and Negative Numbers" Rational Numbers PPT Courseware 2:
"Positive Numbers and Negative Numbers" Rational Numbers PPT Courseware 2 What are negative numbers? We call numbers with - in front of them negative numbers. So why do we introduce negative numbers? What quantities do we usually use positive numbers and negative numbers to represent in our daily life? Combine the following Short video for us to understand. Practice..
"Positive and Negative Numbers" Rational Numbers PPT Courseware:
"Positive and Negative Numbers" Rational Numbers PPT Courseware Question 1: The weather forecast stated that the temperature in Beijing on a certain day in December 2003 was -3~3℃. What is its exact meaning? What is the temperature difference in Beijing on this day? The lowest temperature on this day was minus 3 degrees Celsius, recorded as -3 degrees Celsius. The highest...
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Update Time: 2024-09-09
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