# 7th Grade Vocabulary - Module 1-9

ns845017's version from 2016-04-19 03:07

## Section 1

Module 1 -DifferenceThe results when one number is subtracted from another 16-5 =11, 11 is the difference.
IntegersThe set of whole numbers and their opposites Example- -3,-2,-1,0,1,2,3
Negative Numbers-2 is a negative integer.
OppositesTwo numbers that are an equal distance from zero on a number line, also called additive inverse.
Positive NumbersAn integer greater than zero.
SumThe result when two numbers are added.
Whole NumberThe set of natural numbers and zero.
Absolute ValueThe distance of a number from zero on a number line, shown by I I.
Additive InverseThe opposite of a number. The additive inverse of -5 is 5.
ExpressionA mathematical phrase that contains operations, number, and/or variables.
ModelA mathematical representation of a situation.

## Section 2

Module 2 - DivideTo separate into different parts.
DividendThe number to be divided in a division problem. 8/4 = 2, 8 is the dividend.
DivisorThe number you are dividing by in a division problem. 8/4=2, 4 is the divisor.
MultiplyTo increase the number or the faster version of adding.
ProductThe 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

Model 3 - Whole NumbersThe set of natural numbers and zero.
Negative Numbers-2 is a negative integer.
Positive NumbersAn integer greater than zero.
Rational NumbersAny number that can be expressed as a ratio of two integers.
Repeating DecimalA decimal in which one more digits repeat infinitely. 0.7575757575757
Terminating DecimalA decimal number that ends or terminates. 6.75

## Section 4

Module 4 - ConstantA value that does not change.
Equivalent RatiosRatios that name the same comparison. 1/2 and 1/4 are equivalent ratios.
PercentA ratio comparing a number to 100. 45% = 45/100
RateA ratio that compares two quantities measured in different units.
RatioA comparison of two quantities by division. 12 to 25 , 12;25, 12/25
Complex FractionA 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 RelationshipA relationship between two quantities in which the ratio of one quantity to the other quantity is constant.
Rate of ChangeA ratio that compares the amount of change in the dependent variable to the amount of change in the independent variable.
Unit RateA rate in which the second quantity in the comparison is one unit. 10 cm per minut

## Section 5

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 IncreaseA 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%.
PrincipleThe initial amount of money borrowed or saved.
Simple InterestA 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

Module 6- Algebraic ExpressionAn expression that contains at least one variable. x+ 8 4(m-b)
Distributive PropertyThe 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.
EquationA mathematical sentence that shows that two expression are equivalent. x +4 =7 6+ 1 = 20-3
FactorA number that is multiplied by another number to get a product. 7 is the factor of 21 since 7 *3= 21.
SolutionIn an equation, the value for the variable that makes the equation true.
VariableA symbol used to represent a quantity that can change. 2x + 3, x is the variable.

## Section 7

Module 7 - Algebraic ExpressionAn 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.
ConstantA value that does not change. 3,0, pi
EquationA mathematical sentence that shows that two expressions are equivalent. x +4 =7 6 +1+ 10-3
InequalityA mathematical sentence that shows the relationship between quantities that are equivalent. 5 <8 5x +2 >12
VariableA symbol used to represent a quantity that can change. 2x +3 , x is the variable.