AGENDA – ALGEBRA 1A AUG. 23, 2012 (THURSDAY)  Go over the homework  Lesson 1.2 – Order of Operations  Objectives: 1.Evaluate numerical expressions by using the order of operations. 2.Evaluate algebraic expressions by using the order of operations.  Standard 7AF1.2 – Use the correct order of operations to evaluate algebraic expressions.

 CW #4 – Skills Practice (odd)  HW #3 – Skills Practice (even)  Reflection

PEMDAS Parenthesis Exponent Multiplication Division Addition Subtraction

Example 1: Evaluate each expression. a.15 ÷ 3  6 – 4 2 b. 8 – 6  4 ÷ 3 c – 5  2

Example 2: Grouping symbols Evaluate each expression. a.2(5) + 3(4 + 3) b. 2[5 + (30 ÷ 6) 2 ] c.

Example 3. Evaluate an algebraic expression. a.Evaluate a 2 – (b 3 – 4ac) if a = 7, b = 3, and c = 5. b. Evaluate x(y 3 + 8) if x = 3 and y = 4.