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# OAA Math Terms

### 7th Grade math terms

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

acute | angle greater than 0 and less than 90 degrees |

algorithm | steps used to solve a problem |

associative properties | the answer to a problem will be the same regardless of how you group it. ex. a+b will give you the same answer as b+a |

bivariate data | data that has two variable. |

Box-and-whisker plot | pictorial representation of the median of data and the range of all data from highest to the lowest quartile. |

common factors | a number that divides evenly into two or more expressions |

common referent | something that is familiar that can be used to understand something that is less familiar. ex. A loaf of bread is about 12 inches long. |

communitive property | numbers order in a math problem can be changed (14+2 will give you the same answer as 2+14) but the answer remains the same. |

compatible numbers | a pair of numbers that are easy to work with mentally. Ex. 141 x 4 Could be estimated by 140 X 5 |

congruent | same size and same shape |

correlation (hint: relation) | the relationship between 2 sets of data |

coefficient | A number or symbol multiplied in an algebraic term. ex. 5a - 5 is coeffient and a is the variable. |

distributive property | Math property that states that multiplying a sum by a number is the same as multiplying each addend (the numbers being added) by the number and then adding the products. Ex a x (b + c) will get same answer as (a x b) + (a x c) |

dividend | number that is divided by another 20/4 The 20 is being divided and called dividend.. The 4 is the number dividing and is called the divisor. The answer is called the QUOTIENT. |

equation | a math sentence with an equal sign |

divide | to evenly seperate an amount into equal groups. Ex. Mom buys Reese Cup and says give 1/2 to your brother. You divide it by giving 1 to brother and 1 for yourself. |

equivalent | two numbers or expressions are equal Ex. 210 = 200+10 |

expression | combining variable, number and symbols (but not including inequality and equality symbols) Ex. a+3b |

irrational numbers | any number that can be written as a decimal, but not a fraction. Ex. Pi 3.14... |

face | flat surface on a solid figure |

function table | table that lists pairs of numbers that show a function. |

mean | the average of a set of numbers add all numbers and then divide by the number of addends |

mode | the number in a data set that occur MOST 2,3,2,2 the the mode is 2 |

median | the middle number when data is arranged from least to greatest |

natural numbers | the counting numbers |

negative numbers | numbers less than zero and to the left of the zero on the number line. |

perfect square | the product (answer of multiplication) of a number multiplied by itself. Ex. 16 is the perfect square of 4 because 4x4 |

integers | positive numbers, their opposites and zero -3, -2, -1, 0, 1, 2, 3 |

proportion | an equation that shows that two ratios are equal. Ex. 12/18 = 4/6 |

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cvacca