evaluate algebraic expressions for given replacement values of the variables.
The student will
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Identify examples of the following algebraic vocabulary: equation, variable, expression, term, and coefficient.
An expression that contains a variable is a variable expression. A variable expression is like a phrase: As a phrase does not have a verb, so an expression does not have an “equal sign (=)”. An expression cannot be solved.
A verbal expression can be represented by a variable expression. Numbers are used when they are known; variables are used when the numbers are unknown.
A verbal sentence is a complete word statement (e.g., “The sum of a number and two is five” could be represented by “𝑛 + 2 = 5”).
Represent and solve a practical problem with a one-step linear equation in one variable.