Class Starter 8-12-13 pg. 1

Write an expression that represents the perimeter of the rectangle.

Write an expression that represents the area of the rectangle.

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Using Variables – Standard 1.a.

Translating word phrases and sentences into expressions and

equations and vice versa

Vocabulary

• Variable

• Algebraic expression

• Verbal expression

• Evaluate an expression

Variable

A variable is a symbol, usually a letter, that represents one or more numbers.

Examples:

a b c x y z

Algebraic Expression

An algebraic expression is a mathematical phrase that can include numbers, variables, and operation symbols (operators).

Examples:

n + 7 n - 7 7 X n n ÷ 7

Common Operators

+ - x ÷

Which operator is used in the phrase?• Divided by• Difference• More than• Product• Minus• Sum• Multiplied by• Quotient• Times• Twice

Verbal Expression

An algebraic expression can be translated into a verbal expression.

Examples: Write the algebraic expression as a verbal expression.

7p 7 times p or the product of 7 and p

m divided by 3 or the quotient of m and 3

Evaluate an Expression

To evaluate an expression means to find its value.

Examples: Evaluate the expression.

26 = 2 2 2 2 2 2 Use 2 as a factor 6 times = 64 Multiply.

3 times 11 Translate the verbal expression into an algebraic expression.

3 11 = 33 Multiply.

Write as an algebraic expression.

The difference of 10 and 5

Write as a verbal expression.

𝑥2

Evaluate the expression.

5 squared

Assignment – Variable & Verbal Expressions

Kuta Software worksheet #1-33 odd#2-34 even