Presentation on theme: "Order of Operations When an expression contains more than one operation, you can get different answers depending on the order in which you solve the."— Presentation transcript:
Order of Operations
When an expression contains more than one operation, you can get different answers depending on the order in which you solve the expression.
Here are some examples… Problem Without Order of Operations Following Order of Operations x 2 48 x (4 + 5) x x 7 63
Mathematicians have agreed on a certain order for evaluating expressions, so we all arrive at the same answers. We often use grouping symbols, like parentheses, to help us organize complicated expressions into simpler ones.
Please Excuse My Dear Aunt Sally is a helpful way to remember these rules for the order of operations.
Please First, do all operations that lie inside parentheses. Example: (3 + 12) x 9 (15) x 9
Excuse Next, do any work with exponents or roots. Example: (15) x x 9
My Dear Working from left to right, do all multiplication and division. Example: x
Aunt Sally Finally, working from left to right, do all addition and subtraction. Example:
Important Note: Be sure to follow the order of operations within the parentheses.