Parentheses
Exponents
Multiplication and Division
Addition and Subtraction
All of these done left to right.
Some people memorize it as
PEMDAS and use a mnemonic device to remember it.
Please Excuse My Dear Aunt Sally
The UK equivalent is BIDMAS.
B = Brackets
I = Index
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The two orders of operation are: Perform all calculations inside the parentheses first. Perform all multiplication and division starting from left to right.
-- Since there is no operation indicated, you may assume that I have already performed it. -- In the space just below this text, you'll see the result presented in its simplest form:
It was the first calculator that could perform all four arithmetic operations: addition, subtraction, multiplication and division.
Mathematical operations are usually carried out according to their importance. The acronym to remember is BODMAS - which stands for:-Brackets ()Order ^Division /Multiplication * or xAddition +Subtraction -
The ALU (arithmetic logic unit) An ALU loads data from input registres, an external Control Unit then tells the ALU what operation to perform on that data, and then the ALU stores its result into an output register. Other mechanisms move data between these registers and memory.