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  1. Intro to rational & irrational numbers - Khan Academy

    Learn the difference between rational and irrational numbers, learn how to identify them, and discover why some of the most famous numbers in mathematics, like Pi and e, are actually …

  2. Rational numbers | Khan Academy

    Practice Compare rational numbers using a number line Get 3 of 4 questions to level up!

  3. Rational Numbers | TG Math Class 8 | Khan Academy

    Practice Closure, associative and commutative property of rational numbers (1/2) Get 3 of 4 questions to level up!

  4. Rational numbers | KA Math Class 7 | Khan Academy

    Practice Determine rational numbers on number line pt1 Get 3 of 4 questions to level up!

  5. Rational number arithmetic | Khan Academy

    Practice Up next for you: Missing numbers on the number line Get 3 of 4 questions to level up!

  6. Rational numbers | Class 8th Math (revision) | Khan Academy

    Unit 1: Rational numbers Rational numbers Learn Classifying numbers Comparing rational numbers

  7. Rational numbers and Linear Equations | Khan Academy

    Unit 1: Rational numbers and Linear Equations 300 possible mastery points Mastered Proficient

  8. Irrational numbers | Algebra 1 | Math | Khan Academy

    What does it mean for a number to be irrational? Let's find out. The answer may surprise you.

  9. Rational expressions, equations, & functions | Khan Academy

    This topic covers: - Simplifying rational expressions - Multiplying, dividing, adding, & subtracting rational expressions - Rational equations - Graphing rational functions (including horizontal & …

  10. Proof: there's an irrational number between any two rational …

    You take the sum of an irrational number and a rational number, you get an irrational number. So we've constructed an irrational number that's between these two rationals.