Rational Numbers Properties and Definition
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Rational Numbers Properties and Definition

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Questions and Answers

What is the definition of a rational number?

  • A number that can be expressed as the product of two integers
  • A number that can be expressed as the sum of two integers
  • A number that can be expressed as the difference of two integers
  • A number that can be expressed as the quotient or fraction of two integers (correct)
  • Which property ensures that the order of rational numbers does not change the result of addition and multiplication?

  • Associativity
  • Closure
  • Distributivity
  • Commutativity (correct)
  • What is the first step in adding two rational numbers?

  • Add the denominators
  • Subtract the numerators
  • Convert both numbers to have the same denominator (if necessary) (correct)
  • Multiply the numerators
  • What is the result of multiplying the numerators and denominators when multiplying two rational numbers?

    <p>The product of the numerators and the product of the denominators</p> Signup and view all the answers

    What is the first step in subtracting one rational number from another?

    <p>Convert both numbers to have the same denominator (if necessary)</p> Signup and view all the answers

    Which of the following is a property of rational numbers?

    <p>They are closed under addition, subtraction, multiplication, and division (except by zero)</p> Signup and view all the answers

    What is the purpose of simplifying a fraction after multiplying two rational numbers?

    <p>To express the fraction in its simplest form</p> Signup and view all the answers

    What is the result of adding two rational numbers with the same denominator?

    <p>A fraction with the same denominator</p> Signup and view all the answers

    Study Notes

    Rational Numbers

    Definition

    • A rational number is a number that can be expressed as the quotient or fraction of two integers, i.e., p/q, where p and q are integers and q ≠ 0.
    • It can also be defined as a finite decimal or a ratio of two integers.

    Properties

    • Closure: The set of rational numbers is closed under addition, subtraction, multiplication, and division (except by zero).
    • Commutativity: The order of rational numbers does not change the result of addition and multiplication.
    • Associativity: The order in which rational numbers are added or multiplied does not change the result.
    • Distributivity: Multiplication of rational numbers distributes over addition.

    Addition

    • To add two rational numbers, follow these steps:
      1. Convert both numbers to have the same denominator (if necessary).
      2. Add the numerators.
      3. Keep the same denominator.

    Multiplication

    • To multiply two rational numbers, follow these steps:
      1. Multiply the numerators.
      2. Multiply the denominators.
      3. Simplify the resulting fraction (if possible).

    Subtraction

    • To subtract one rational number from another, follow these steps:
      1. Convert both numbers to have the same denominator (if necessary).
      2. Subtract the numerators.
      3. Keep the same denominator.

    Rational Numbers

    Definition

    • A rational number is a number that can be expressed as the quotient or fraction of two integers (p/q), where p and q are integers and q ≠ 0.
    • It can also be defined as a finite decimal or a ratio of two integers.

    Properties

    Arithmetic Operations

    • The set of rational numbers is closed under addition, subtraction, multiplication, and division (except by zero).
    • The order of rational numbers does not change the result of addition and multiplication (commutativity).
    • The order in which rational numbers are added or multiplied does not change the result (associativity).
    • Multiplication of rational numbers distributes over addition (distributivity).

    Operations with Rational Numbers

    Addition

    • Convert both numbers to have the same denominator (if necessary).
    • Add the numerators.
    • Keep the same denominator.

    Multiplication

    • Multiply the numerators.
    • Multiply the denominators.
    • Simplify the resulting fraction (if possible).

    Subtraction

    • Convert both numbers to have the same denominator (if necessary).
    • Subtract the numerators.
    • Keep the same denominator.

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    Learn about the definition and properties of rational numbers, including closure and commutativity.

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