Lesson 1-6/ 1-7 Writing Algebraic Expressions
description
Transcript of Lesson 1-6/ 1-7 Writing Algebraic Expressions
Lesson 1-6/ 1-7Writing
Algebraic Expressions
To evaluate an expression, substitute a number for a variable
Example 1: Evaluate 3n + 7 when n = 3
Example 2: Evaluate n ÷ 2 + n when n = 4
(use PEMDAS)
Example 3: Evaluate 9 + 3p – 5t + 3 when p = 2 and t = 1
(use PEMDAS)
Example 4: Evaluate m² + y/5 when m = 2 and y = 35
(use PEMDAS)
How would you write this expression out in
words?
n + 25
Operation Key Words+ • Add
• More than• Sum
• Increased by
- • Subtract• Minus
• Difference of • Less than• Take away • Decreased by
x • Times• Multiplied by• Product of
÷ • Divided by• Quotient
Quotient
Sum
Less than
Product
More than
Difference
Increased by
Write each phrase as an algebraic expression
Example 5: 4 more than a number
Example 6: the product of 20 and t
Write each phrase as an algebraic expression
Example 7: the sum of 4 times a number and
2
Write each phrase as an algebraic expression
Example 8: 4 times the sum of a number and 2
Write each phrase as an algebraic expression
Example 9: m plus the product of 6 and n
Write each phrase as an algebraic expression
Example 10: 14 less than the quantity k times 6