1.1 Symbols and Expressions Use order of operations Evaluate algebraic expressions

Vocabulary: Variable: a letter used in math, such as x, that represents the unknown Algebraic Expression: has no = and contains a variable Substituting: replacing the variable with a number Evaluate: substitute a number in for the variable and calculate Grouping Symbols: Parenthesis ( ), Brackets [ ] or Set Notation { }

Order of Operations~ PEMDAS Parenthesis ( ) { } [ ] Exponents Multiply L Divide R Addition 3+4 Subtraction 12-3

Order of Operations Do all grouping symbols first. Apply Order of Operations inside grouping symbols Find any exponents or roots Multiply or Divide which ever comes first going from left to right Add or Subtraction which ever comes first going from left to right

Order of Operations Example 1: { }

Order of Operations Example 2:

Order of Operations: Example 3:

Evaluate for the Algebraic Expression Substitute what the variable =‘s into the expression Calculate to its simplest terms Remember to use the order of operations

Example 4:

Example: 5 5 times “t”

Example 6:

Example 7:

Example 8:

Homework Assignment: Page 7 #’s 16-40 even Remember to: 1 Homework Assignment: Page 7 #’s 16-40 even Remember to: 1.) Title your homework (page #, problems assigned, name, period and #) 2.)Write each question and signify your answer 3.) Show all work and attempt all problems

Order of Operations by Rihana

Order of Operation to Umbrella When we begin We begin together Parenthesis first now Please be clever Exponent come right next In line Then Multiply and Divide At the same time Now Subtraction and Addition Walk it out with Computations It’s the order of operations Ation, ation, ation, eh, eh Eh, eh operations!