Math CentralQuandaries & Queries


Question from Devon, a parent:

What function precedes the other? ie; 18 - 4 x 2 =


There is a technique some people use to remember the order of precedence for arithmetic operations. It's called BEDMAS

B: Perform any operations inside brackets
E: Perform any exponentiation or powers
D: Division
M: Multiplication
A: Addition
S: Subtraction

You have multiplication and subtraction so multiplication takes precedence and you get

18 - 4 × 2 = 18 - 8 = 10.

I hope this helps,

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