Rational numbers and commutative law

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SUMMARY

The discussion focuses on proving that the addition and multiplication of rational numbers adhere to the commutative and associative laws. It emphasizes that if these properties are assumed for integers, one can extend the proof to rational numbers by incorporating multiplication by the common denominator. The key takeaway is that understanding the foundational properties of integers is crucial for demonstrating these laws in the context of rational numbers.

PREREQUISITES
  • Understanding of integer properties, specifically commutative and associative laws.
  • Knowledge of rational numbers and their representation.
  • Familiarity with common denominators in fraction operations.
  • Basic algebraic manipulation skills.
NEXT STEPS
  • Study the proof of commutative and associative laws for integers.
  • Explore the concept of common denominators in rational number operations.
  • Investigate the properties of rational numbers in algebraic structures.
  • Learn about formal proofs in mathematics, particularly in number theory.
USEFUL FOR

Students of mathematics, educators teaching number theory, and anyone interested in the foundational properties of rational numbers and their operations.

bips2010
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How can i prove that addition and mulitiplication of rational numbers follow commutative and associative law?
 
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If you can assume those properties for integers, then you might want to figure out how to incorporate multiplication by the common denominator for your rational expressions.
 

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