# Shared Flashcard Set

## Details

Introduction to Algebra
Na
8
Mathematics
08/30/2012

Term
 Variable
Definition
 A variable is a lettter, such as a or b or y, that represents one or more numbers.
Term
 Algebraic expression
Definition
 An algebraic expression is an expression that includes one or more variables
Term
 Substituting
Definition
 Substituting is when you replace a variable in an algrbraic expression with a number.
Term
 Evaluate
Definition
 To evaluate an algebraic expression, substitute a number for each variable and calculate.
Term
 Natural numbers
Definition
 Natural numbers are numbers used for counting:1, 2, 3, and so on.
Term
 Whole numbers
Definition
 Whole numbers are the natural numbers and zero:0, 1, 2, 3, and so on.
Term
 Rational numbers
Definition
 Rational numbers include fractions and improper fractions:2/3, 6/3, 4/1.These numbers include natural and whole numbers.
Term
 Grouping symbols
Definition
 Grouping symbols indicate that the operations within them should be done first. Parentheses and The fraction bar are grouping symbols.
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