Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction (remember that multiplication and division occur at the same time starting at the left and moving right and the same is true of addition and subtraction. So the six letters: PEMDAS Which is commonly expressed as Please Excuse My Dear Aunt Sally or Purple Elephants Marching Down A Street.
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In math, the Commutative Property refers to operations in which the order of the numbers being operated on does not matter. Multiplication and addition are commutative operations, which may be demonstrated by the algebraic equations "ab = ba" and "a + b = b + a", respectively.
It doesn't come from anyone direct a group of people made up the rules
math algebra
Well honey, any career that involves math or problem-solving will use the order of operations. So, if you're into being a mathematician, engineer, scientist, or even a financial analyst, better brush up on those PEMDAS rules. Otherwise, you'll be more lost than a sock in the dryer.
Since the word MATH does not have any duplicated letters, the number of permutations of those letters is simply the number of permutations of 4 things taken 4 at a time, or 4 factorial, or 24.