Chapter 1-2: Order of Operations

Example 1 Evaluate Expressions

Evaluate each expression.◦12 - 4 ÷ 2 ⋅ 5

◦36 ÷ 32 + 4 ⋅ 2 - 1

Example 2 Grouping Symbols

Evaluate each expression.a. 6(11 - 7) - 4(2 + 1)4[(16 ÷ 2) - (4 + 2)]

Example 3 Fraction Bar

Evaluate◦ 33 ÷ 9◦11 - 22.

Example 4 Evaluate an Algebraic Expression

Evaluate ◦(x2 - 2zy) + y3 if x = 8, y = 3 and z = 5.

Example 5 Use Algebraic Expressions

Jamie has $500 to invest for 3 years. She finds a bank that will invest her money at a simple interest rate of 5%. Interest I is equal to the principle P (amount invested) times the product of the rate r as a decimal and the time t in years.◦ Write an expression that represents simple interest.

◦ Find the amount of interest earned after 3 years.

◦ .