BODMAS

BODMAS

What is BODMAS

What is BODMAS?

• BODMAS is a set of rules that allows us to solve equations using the proper procedures. Brackets of or order, Division, Multiplication, Addition, and Subtraction are all abbreviated as BODMAS. 

"Operations" 

Operations mean things like add, subtract, multiply, divide, squaring, etc. If it isn't a number it is probably an operation.

But, when you see something like...

7 + (6 × 5² + 3)..

what part should you calculate first?

Start at the left and go to the right?

Or go from right to left?

Warning: Calculate them in the wrong order, and you can get a wrong answer !

Order of Operations

Do things in Brackets First

 4 × (5 + 3)=4 × 8=32   (right)

4 × (5 + 3)=20 + 3=23 (wrong)

Order of Operations

Powers, Roots before Multiply, Divide, Add or Subtract

 5 × 2² = 5 × 4 = 20 (right)

 5 × 2² = 102 = 100 (wrong)

Order of Operations

Multiply or Divide before you Add or Subtract

 2 + 5 × 3 = 2 + 15 = 17  (right)

 2 + 5 × 3 = 7 × 3 = 21 (wrong)

Order of Operations

Otherwise just go left to right

 30 ÷ 5 × 3 = 6 × 3 = 18 (right)

  30 ÷ 5 × 3 = 30 ÷ 15 = 2 (wrong)

How Do I Remember It All ... ? BODMAS !

B - Brackets first

O - Orders (i.e. Powers and Square Roots, etc.)

DM - Division and Multiplication (left-to-right)

AS - Addition and Subtraction (left-to-right)

Multiple Choice

 $4\times\left(3+4\right)-2^2\div44×(3+4)−22÷4$                                          Answer by using the operations

• 27

• 3

• 24

• 6

 What is the answer?

Multiple Choice

 $5-5\times5+5=?$  

• 45

• -15

• -25

• 0

How Do I Remember It All ... ? BODMAS !

B - Brackets first

O - Orders (i.e. Powers and Square Roots, etc.)

DM - Division and Multiplication (left-to-right)

AS - Addition and Subtraction (left-to-right)