Variables and Expressions
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17 Terms
Numerical Expression
A mathematical phrase that consists of numbers and operations symbols. (ex. 4 + 15)
Evaluate
To find or solve
Equivalent Expressions
Expressions that always have the same value.
Sum
The answer to an addition problem.
Difference
The answer to a subtraction problem.
Product
The answer to a multiplication problem.
Quotient
The answer to a division problem.
Algebraic Expression
A mathematical phrase that consists of variables, numbers, and operation symbols. (3x + 4)
Variable
A letter that represents an unknown value. (ex. x, y, a)
Term
A number, variable, or the product of a number and one or more variables. (ex. z, 3y, and 12)
Constant
A term that contains (is made of) a number. (ex. 12)
Coefficient
Is the number part of a term that contains the variable. (ex. in 3x, 3 is the coefficient)
Factors
Are multiplied to give a product.
Power
A number expressed using an exponent.
Base
The repeated factor of a number written in exponential form. (ex in 3⁴ the 3 is the base)
Exponent
A number that shows how many times a base is used as a factor. (ex in 3⁴ the 4 is the base)
Bar Diagram
A way to represent part to whole relationships.
