# 7th Grade Vocabulary - Module 1-9

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## Section 1

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

Module 1 -Difference | The results when one number is subtracted from another 16-5 =11, 11 is the difference. |

Integers | The set of whole numbers and their opposites Example- -3,-2,-1,0,1,2,3 |

Negative Numbers | -2 is a negative integer. |

Opposites | Two numbers that are an equal distance from zero on a number line, also called additive inverse. |

Positive Numbers | An integer greater than zero. |

Sum | The result when two numbers are added. |

Whole Number | The set of natural numbers and zero. |

Absolute Value | The distance of a number from zero on a number line, shown by I I. |

Additive Inverse | The opposite of a number. The additive inverse of -5 is 5. |

Expression | A mathematical phrase that contains operations, number, and/or variables. |

Model | A mathematical representation of a situation. |

## Section 2

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

Module 2 - Divide | To separate into different parts. |

Dividend | The number to be divided in a division problem. 8/4 = 2, 8 is the dividend. |

Divisor | The number you are dividing by in a division problem. 8/4=2, 4 is the divisor. |

Multiply | To increase the number or the faster version of adding. |

Product | The results when two or more numbers are multiplied. The product of 4 and 8 is 32. |

Quotient | The result when one number is divided by another. In 8/4=2, 2 is the quotient. |

## Section 3

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

Model 3 - Whole Numbers | The set of natural numbers and zero. |

Negative Numbers | -2 is a negative integer. |

Positive Numbers | An integer greater than zero. |

Rational Numbers | Any number that can be expressed as a ratio of two integers. |

Repeating Decimal | A decimal in which one more digits repeat infinitely. 0.7575757575757 |

Terminating Decimal | A decimal number that ends or terminates. 6.75 |

## Section 4

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

Module 4 - Constant | A value that does not change. |

Equivalent Ratios | Ratios that name the same comparison. 1/2 and 1/4 are equivalent ratios. |

Percent | A ratio comparing a number to 100. 45% = 45/100 |

Rate | A ratio that compares two quantities measured in different units. |

Ratio | A comparison of two quantities by division. 12 to 25 , 12;25, 12/25 |

Complex Fraction | A fraction that contains one or more fractions in the numerator, the denominator, or both. |

Constant of Proportionality | A constant ratio of two variables related proportionally. Y=5x, the constant of proportionality is 5. |

Proportion | An equation that states that two ratios are equivalent. 2/3 = 4/6 |

Proportion Relationship | A relationship between two quantities in which the ratio of one quantity to the other quantity is constant. |

Rate of Change | A ratio that compares the amount of change in the dependent variable to the amount of change in the independent variable. |

Unit Rate | A rate in which the second quantity in the comparison is one unit. 10 cm per minut |

## Section 5

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

Module 5- Percent of Decrease | A percent change describing a decrease in a quantity. An item costs $8 is marked down to $6. The amount of the decrease is $2 and the percent of decrease is 2/8 =0.25 = 25%. |

Percent of Increase | A percent change describing an increase in a quantity. The prize of an item increase from $8 to $12. The amount of the increase is $4 and the percent of the increase is 4/8 = 0.5 =50%. |

Principle | The initial amount of money borrowed or saved. |

Simple Interest | A fixed percent of the principal. It is found using the formula I = prt, where p represents the principal, r the rate of interest, and t the time. $100 is put into an account with a simple interest rate of %5. After 2 years, the account will have earned I = 100 * 0.05 * 2 = $10 |

## Section 6

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

Module 6- Algebraic Expression | An expression that contains at least one variable. x+ 8 4(m-b) |

Distributive Property | The property that states if you multiply a sum by a number, you will get the same results if you multiply each addend by that number and then add the products. |

Equation | A mathematical sentence that shows that two expression are equivalent. x +4 =7 6+ 1 = 20-3 |

Factor | A number that is multiplied by another number to get a product. 7 is the factor of 21 since 7 *3= 21. |

Solution | In an equation, the value for the variable that makes the equation true. |

Variable | A symbol used to represent a quantity that can change. 2x + 3, x is the variable. |

## Section 7

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

Module 7 - Algebraic Expression | An expression that contains at least one variable. x + 8 4(m-b) |

Coefficient | The number that is multiplied by the variable in an algebraic expression. 5 is the coefficient is 5b. |

Constant | A value that does not change. 3,0, pi |

Equation | A mathematical sentence that shows that two expressions are equivalent. x +4 =7 6 +1+ 10-3 |

Inequality | A mathematical sentence that shows the relationship between quantities that are equivalent. 5 <8 5x +2 >12 |

Variable | A symbol used to represent a quantity that can change. 2x +3 , x is the variable. |

## Section 8

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

Module 8 - Angle | A figure formed by two rays with common end point called the vortex. |

Degree | The unit of measure for angels or temperature. |

Dimension | The length, width, or height of a figure. |

Polygon | A closed plane figure formed by the three or more line segments that intersect only at their endpoints (vertices). |

Ratio | A comparison of two quantities by division. 12 to 25 , 12 :25, 12/25 |

Adjacent Angles | Angles in the same plane that have a common vertex and a common side. |

Complementary Angles | Two angles whose measures add to 90` |

Congruent Angles | Angels that have the same measure. |

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