Order of Operations

Lesson 1


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The order of operations is a rule used to clarify which procedures should be performed first in a given mathematical expression.

The Elements
There are six elements in the order of operations.
  • B = Brackets
  • I = Indices
  • D = Division
  • M = Multiplication
  • A = Addition
  • S = Subtraction

Brackets simply look like this: ( ). Brackets don't just look like that in an equation.Brackets have to go around an element of an equation: i.e. 9 + (8-3).

DID YOU KNOW: Brackets also have other uses in algebra?


Take an A4 piece of paper and put it landscape. Now rule six fairly even columns. Rule a line in the middle of the page so that there are now 2 rows. Now cut the piece of paper up to the crease on each line so that there are now 6 flaps. On each of these flaps, write the order of operations (in order) from left to right. under these
flaps, write what you know about that operation. Afterwards, you may decorate your creation.

Example of BIDMAS:

Let's take the sum 19-2x9+1. What does it equal?

Basically, first in that sum that is in BIDMAS, is multiplication. SO first we do the multiplication which is 2x9=18. So there's the first part done but next is addition. We add 1 to 18 which is 19 then we have to subtract. 19-19=0. So the answer to that equation is 0.

Order of Operations in REALITY

You might be in some cases where you have to take BIDMAS to reality. Like in supermarkets. In supermarkets, they might have deals like get 2 for the price of 1. That is where, in some cases, BIDMAS comes in handy (e.g. chocolate bars. They might be $2 each. You'll have to add them up ($4), but then take away the original price ($2) which equals the original price ($2).