Order of Operations
Math is all about rules. You can’t go around saying 2
+ 3 = 87. You have to follow rules when adding, subtracting, multiplying,
dividing, or squaring. The order of mathematical operations is commonly
known as PEMDAS. This nifty acronym shows the order
in which mathematical operations should be performed as you work
through an expression or equation.
There is a small catch to the last two steps
of PEMDAS. Once you’re left with addition and subtraction, you move from
left to right in the equation.
Let’s take old PEMDAS out for a spin.
First, work out the stuff in the parentheses:
Then do the exponents:
Now multiply like wild dogs are chasing you:
Next, calmly divide anything that needs dividing:
Then do the addition and subtraction, moving from left