# Math Vocabulary

## 21 terms

### variable

a symbol (like x or y) that is used to represent a quantity that can change

### constant

a value that does not change

### evaluate

to find the value of a numerical or algebraic expression

### algebraic expression

An expression that contains at least one variable

### equation

a mathematical statement that shows two expressions are equal

### solution

a method for solving a problem

### term

the parts of an expression that are added or subtracted

### coefficient

the number that is multiplied by the variable in an algebraic expression

### inverse operation

operations that undo each other, such as addition and subtraction, multiplication and division

### compatible numbers

Numbers that are close to the given numbers that make estimation or mental calculation easier

### reciprocal

(mathematics) one of a pair of numbers whose product is 1: the reciprocal of 2/3 is 3/2

### LCM (least common multiple

the least number, other than zero, that is the multiple of two or more given numbers

### integer

any of the natural numbers (positive or negative) or zero

### power

a mathematical notation indicating the number of times a quantity is multiplied by itself

### exponent

a mathematical notation indicating the number of times a quantity is multiplied by itself

### base

when a number is raised to a power the number that is used as the factor

### numerical expression

an expression that includes numbers and operations

### order of operations

set of rules followed when evaluating an expression PEMDAS

### commutative property

The order of two numbers may be switched around and the answer is the same. a+b=b+a

### associative property

Changing the grouping of numbers will NOT change the value. For example: (7 + 4) + 8 = 7 + (4 + 8) also works with multiplication

### identity property

a property in addition where when you add zero to a number it doesn't change, in multiplication its when you multiply a number by one