# Pre-Algebra Vocab

## 34 terms · For Pre-Algebra (not Honors)!

### variable

a letter or symbol that stands in the place of a number

### variable expression

a number sentence using at least one variable and sometimes numbers and operation symbols
no equals sign

### evaluate

you _____ an expression; when _____ a variable expression you replace the variable with a number then use order of operations to simplify

### solve

you _____ an equation

### opposites

two numbers the same distance away from zero, on opposite sides of the zero sign

1, 2, 3...

0, 1, 2, 3...

### integers

a set of whole numbers and their opposites

### absolute value

the distance a number is from zero

### inductive reasoning

making a conclusion based on patterns you observe

### conjecture

a conclusion you reach by inductive reasoning

### counter-example

an example that contradicts a conjecture

### outliers

data value(s) that are much larger or smaller than the rest of the data set

### mean

the sum all the numbers divided by the number of data items

### median

the data that falls right in the middle of the data, when they are arranged in order from least to greatest

### mode

the number that occurs most often in a data set
a data set can have more than one

### range

the difference between the smallest and largest value in a data set

### population

a group from which you want information

### sample

a part of a population used to make an estimate about the whole population

### random sample

a sample where each member of a population has an equal chance to be selected

### commutative prop. of add. and mult.

the answer to an equation does not change if numbers in an equation are switched

### associative prop. of add. and mult.

changing the grouping in an equation will not change the answer

### identity prop. of add. and mult.

the sum of a number and 0 is equal to that number,
product of a number times 1 is equal to that number

### 1

multiplicative identity

### term

a number or the product of a number and a variable

### constant

a term that has no variables

### like terms

two numbers that have identical variables

### coefficient

a number that multiplies a variable

### solution

a value(s) of the variable that makes the equation or inequality a true statement

### equation

a mathematical statement in which two equations are equal

### inequality

any mathematical sentence that contains the symbols:
<, >, _< (greater than or equal to), _> (smaller than or equal to), or =

### formula

an equation that shows a relationship between quantities that are represented by variables

### KHDBDCM

the metric system