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Authoritative PPT Summary
"Rational Numbers" PPT courseware
review review
1. What are positive and negative numbers?
2. The meaning of “0”
3. The classification of numbers we have learned so far.
gather
1. Concept: All the numbers of a type with certain characteristics form a set of numbers.
Example: All positive integers form the set of positive integers;
Therefore, negative integers form the set of negative integers;
All positive fractions form the set of positive fractions;
2. Representation of sets
(1) Circle method
(2) Braces method
1.5 can be written as the ratio of 3 and 2. If two integers are required to be relatively prime, the answer is unique
summary:
1. Main knowledge
The concept of rational numbers: Integers and fractions are collectively called rational numbers.
2. Classification of rational numbers
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"Mixed Operations of Rational Numbers" PPT courseware 3:
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