- Simplify expressions inside Parentheses.
- Evaluate powers, or numbers with Exponents.
- Multiply and Divide, moving from left to right.
- Add and Subtract, moving from left to right.
Tuesday, December 10, 2013
Arithmetic Operations and PEMDAS in Mathematics
Arithmetic operations and PEMDAS You will find several arithmetic problems on the GRE, GMAT or SAT, which involve intense calculations and if they are not done in a specific order, they can produce varying results. Because only one answer choice can be correct, you will not be rewarded for any other result except THE ONE. This requires mustering the ancient fundamentals that you might have leant at your schools level. The order of operations is a set of rules that tells us how to evaluate expressions. You might have heard or used this acronym quite often, PEMDAS. Many also use a sentence to remember it “Please Excuse My Dear Aunt Sally.” Whichever way you choose, what is quintessential is to remember the way in which arithmetic operations follow PEMDAS. The letters in PEMDAS are meant to help you remember to: