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Topic 10 Expressions and Equations

Terms in this set (8)

Order of Operations
Tells the rule for which calculations to do before others. First, do the work inside the parentheses and brackets. Then do multiplication and division in order from left to right. Finally, do addition and subtraction in order from left to right.
brackets
[ ] A square set of symbols used as the second set of grouping symbols in expressions and equations.
parentheses
Curved mathematical symbols used as the first set of grouping symbols in equations and expressions.
numerical expression
A mathematical phrase that contains numbers and at least one operation. 5 + 3 for example.
algebraic expression
A mathematical phrase containing numbers, an operation(s), and a variable(s). 3x + 2y for example.
equation
A mathematical sentence that uses an equal sign to show two expressions have the same value.
unknown
A letter, such as x, that represents a number in an expression or equation.
variable
A letter, such as x, that represents a number in an expression or equation.
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