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Transcript 
Bell Ringer
Writing an
Expression
Writing Algebraic Expressions
Variable
• Symbol usually a letter that represents
one or more numbers
• Ex: n, a, x
• Algebraic Expression
• Mathematical phrase that can include
numbers, variables, and operation
symbols
•
Writing Algebraic Expressions
Addition
• More than, sum
• Ex: Seven more than n
n+7
• Subtraction
• Difference, minus, less than
• Ex: Difference of n and 7
n-7
•
Writing Algebraic Expressions
Multiplication
• Product, times
• Ex: the product of seven and n
7n or 7*n or 7(n)
• Division
• Quotient, divided by
• Ex: quotient of n and 7
n/7 or n ÷ 7
•
Writing Algebraic Expressions
• Ex: Two times a number plus 5
2r + 5
• Ex: 7 less than three times a
number
3y – 7
Writing Algebraic Expressions
• Ex: 5 less than a number
n-5
• Ex: The sum of twice a
number and 5
2n+5
Writing Algebraic Expressions
• Ex: 3x + 5
Three times a number greater
than 5
• Ex: 8x3
Eight times a number to the
third power
Homework
Page 7
(11-35 odd, 40)
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