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Rational vs Irrational Numbers - YourTeacher.com - Math Help

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Uploaded by on Oct 26, 2007

For a complete lesson on rational vs irrational numbers, go to http://www.yourteacher.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn that the following number sets represent rational numbers: natural numbers, whole numbers, integers, fractions, terminating decimals, and repeating decimals. For example, -2, 7, 3/4, 0.0006, and 0.191919... are all rational numbers. However, a decimal that is both non-terminating and non-repeating is an irrational number. For example, 0.12579835781... and 39.779778776775... are irrational numbers.

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  • dejavu544455544455, you are so stupid. she is here to teach MATH. not be hot. so shut the fuck up.

  • Simply:

    Rational- A number that either terminates or repeats, and can be expressed as a fraction.

    Irrational- A number that neither terminates nor repeats, and cannot be expressed as a fraction.

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All Comments (76)

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  • @leon8chicken she is basically saying that this is a rational set of numbers because it repeats :)

  • Half the video is a dumb intro and the other half is her writing the word Rational

  • Isn't she INCORRECT when she states that 5.252525... is RATIONAL?????

    The repetition of the "25" 3 times after the decimal place could simply be a coincidence and the number at the dotted lines could be a completely different number (eg. 5.252525639)

    Please correct me if I am wrong, as I simply want to get the concept correct, but if I am correct, I wouldn't trust these videos to handle much bigger, more advanced, concepts.

  • its kinda sad when the chick doesnt explain everything about rational and irrational numbers so everyone has to talk about it at the bottom :)

  • @foofoobrownie irrational

  • the guys better

  • can anyone tell me if the square root of 28 if rational or irrational

  • ........

  • Just be glad you MS and HS fuckers have youtube to turn too. Back when we were in school it was brutal if you got a bad teacher.

  • whale fetus

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