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# 2013-8thMathPTVocab2

### SHMS 8th Grade Math Powertime Vocab 2

Term | Definition |
---|---|

Algebraic Expression | A mathematical phrase involving at least one variable. They can contain numbers and operation symbols. |

Cube Root | One of three equal factors of a number. For example. 3 x 3 x 3 = 27, so 3 is this for 27. |

Exponent | The number of times a base is used as a factor of repeated multiplication. |

Equation | A mathematical sentence that contains an equals sign. |

Inverse Operation | Pairs of operations that undo each other, for example, addition and subtraction OR division and multiplication. |

Irrational | A real number whose decimal form is non-terminating and non-repeating that cannot be written as the ratio of two integers. |

Like Terms | terms that have the same variable raised to the same power. Only the coefficients of these terms can be different. |

Multiplicative Inverses | Two numbers that when multiplied together equal 1, for example, 4 and ¼. |

Perfect Square | A number that has a rational number as its square root. |

Radical | A symbol that is used to indicate square roots. |

Rational | A number that can be written as the ratio of two integers with a nonzero denominator. |

Scientific Notation | A representation of real numbers as the product of a number between 1 and 10 and a power of 10, used primarily for very large or very small numbers. |

Square Root | One of two equal factors of a nonnegative number. For example, 5 is this for 25 because 5 • 5 = 25. -5 is also this for 25 because (-5) • (-5) = 25. |

Variable | A letter or symbol used to represent a number. |

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hbogue