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# Math Unit_7

### Exponents and Negative Numbers Vocabulary

Question | Answer |
---|---|

Account Balance | An amount of money that you have or that you owe. |

Exponential notation | A way to show repeated multiplication by the same factor. For example, 23 is exponential notation for 2 * 2 * 2. |

Expression | A mathematical phrase made up of numbers, variables, operation symbols, and/or grouping symbols. An expression does not contain symbols such as =, <, or >. Examples: 2 + 3 √2ab л r2 9x - 2 |

Negative Number | A number that is less than zero; a number to the left of zero on a horizontal number line or below zero. |

Nested Parentheses | Parenthesis inside a parenthesis in an expression. Expressions are evaluated from within the innermost parentheses outward following the order of operations. Example: ((6 + 2) * 3) / 2 (8 * 3) / 2 24 / 2 = 12 |

Number-and-Word Notation | A way of writing a number using a combination of numbers and words. For example, 27 billion is number-and-word notation for 27,000,000,000. |

Opposite of a Number | A number that is the same distance from 0 on the number line as given number, but on the opposite side of 0. For example, the opposite of +3 is –3. |

Order of Operations | Rules that tell in the order in operations in an expression should be carried out. The order of operations is:1. Do operations inside grouping symbols first. (Use rules 2-4 inside the grouping symbols.)2. Calculate all the expressions with exponents. |

Parentheses ( ) | Grouping symbols used to indicate which operations in an expression should be done first. |

Scientific Notation | A system for writing numbers in which a number is written as the product of a power of 10 and a number that is at least 1 and less than 10. For example, 3*105 is scientific notation for 300,000. |

Slide Rule | An Everyday Mathematics tool used for adding and subtracting integers and fractions. |

Standard Notation | the most familiar way of representing whole numbers, integers, and decimals. For example, standard notation for three hundred fifty six is 356. |

Created by:
mrsthompson