1. Chapter 6 Algebraic Expressions

2. Please Excuse My Dear Aunt Sally
Order of Operations
P parenthesis
E exponents
M multiply
D divide
A add
S subtract
Please Excuse My Dear Aunt Sally
Which ever one comes 1st
from left to right
Which ever one comes 1st
from left to right

3. 6-1 (A) Numerical Expressions
An expression that contains both numbers & operations.
You use Order of Operations to find the value of the expression.
7² is called a Power.
Write the power as a product: 7 x 7
Evaluate the expression: 7 x 7 = 49

4. 6-1(B) Variables & Expressions
Algebraic Expressions* use variables* and numbers.
To Evaluate you substitute the variable with the given value and use Order of Operations*.
Ex: 5m – 7 if m = 4
5(4) – 7
20 – 7 13
*refer to vocab sheet

5. 6-1(C-D) Writing Expressions
Addition Subtraction Multiplication Division
plus minus times divided
sum difference product quotient
more than less than multiplied per
increased by decreased by twice separate
in all less each

6. 6-1 (E) Problem Solving Investigation
Understand – “What is given?” “What is needed?”
Plan – pick a strategy
Solve – carry out the plan / use labels, units or symbols
Check - “Does my answer make sense?”

7. 6-2 (A - C) Properties Commutative of: Addition: 2 + 3 = 3 + 2
Multiplication: 4 x 5 = 5 x 4
Associative of Addition: (2 + 3) + 4 = 2 + (3 + 4)
Multiplication: ( 2 x 3) x 4 = 2 x (3 x 4)
Identity of Addition: = 5
Multiplication: 6 x 1 = 6
Distributive: 5( 2 + 3) = 5 x x 3