class starter8-12-13 pg. 1 write an expression that represents the perimeter of the rectangle. write...
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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