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Level 489

## Ignore words

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Variable
A symbol used to represent one or more numbers.
Values of the Variable
What the variable means.
variable expression
An expression that contains a variable.
Numerical Expression/Numeral
An expression that names a particular number.
Value of the Expression
The number named by a numerical expression.
Simplifying the Expression
Replacing a numerical expression by the simplest name for its value.
Grouping Symbol
A device, such as parentheses, used to enclose an expression that should be simplified first.
Equation
Formed by placing an equals sign between two numerical or variable expressions.
Open Sentences
Sentences containing variables.
Domain
The given set of numbers that a variable may represent.
Solution/Root
Any value of a variable that turns an open an open sentence into a true statement.
solution set
The set of all solutions of an open sentence.
Increased, sum, more than, plus, and, add to, increase, total, together, more, with.
Subtraction
Less, take away, difference, minus, decrease, less than, subtract from.
Multiplication
By, of, square area, twice, volume, product, cubed, circumference, times, multiply by.
Division
Numerator, divided by, quotient, square root, by, goes into, ratio, fraction, over, denominator.
PEMDAS
Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.
No Solution
{} Null set.
solve
Means you must put {} Braces.
Evaluate or Simplify
No {} Braces.
origin
Point labeled zero.
Whole Numbers
Consists of zero and all positive numbers.
Integers
Tick marks on a number line.
real numbers
Consists of any number that is positive, zero, and negative.
Inequality Symbols
They are used to show the order of two real numbers.
opposites
Each number has a pair such as 4 and -4.
absolute value
The positive number of any pair of opposite non-zero real numbers.
real numbers
Include all positive and negative numbers and zero such as positive and negative fractions, decimals, and rational and irrational numbers.
Rational numbers
Any number that can be written as a fraction.
Irrational Numbers
Any positive or negative non-repeating or non-terminating decimal, such as pie or the square root of 2 which cannot be written as a fraction.
Integers
Positive and negative whole numbers and zero.
Variable
A letter that can be replaced by a number.
Coefficient
a number multiplied by a variable or variables.
term
numbers or variables separated by + or -- signs.
constant
A term that does not have a variable.
numerical expression
Two or more terms using only constants (numbers).
algebraic expression
Two or more terms that include one or more variables.
Sentence
Two algebraic expressions connected by =, not equal to, <, >,
Equation
A sentence with an equal sign.
inequality
A sentence with one of the following signs: not equal to, <, >,
Base
The number used as a factor.
exponent
The number of times the base is multiplied by itself.