ppt about bodmas rule

1. BODMAS

2. 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?
Calculate them in the wrong order, and you will get a
wrong answer !
Why do we need BODMAS ?

3. What is BODMAS ?
+ Bracket = ( )
+ Orders or power Of = Powers and Square Roots,
etc.
+ Multiplication = ×
+ Division = ÷
+ Addition = +
+ Subtraction = -

4. How do I Remember ?
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)

5. Brackets
+ Brackets are used to group things.
+ This is the first thing you do in a question.
+ Do things in Brackets First.
 6 × (5 + 3) = 6 × 8 = 48
 6 × (5 + 3) = 30 + 3 = 33 (wrong)

6. Multiplication/ Division
+ In the Order of Operations, you would complete the
equation left to right, doing which ever one appears
first, Multiplication or Division.
+ The symbol for multiplication is ‘x’.
+ Remember to go from left to right.
+ Multiply or Divide before you Add or Subtract.
 2 + 5 × 3 = 2 + 15 = 17
 2 + 5 × 3 = 7 × 3 = 21 (wrong)

7. + Division is an equation that puts numbers in to
groups.
+ The Division symbol is ÷
+ Remember to go from left to right
 30 ÷ 5 × 3 = 6 × 3 = 18
 30 ÷ 5 × 3 = 30 ÷ 15 = 2(wrong)

8. Addition / Subtraction
+ In the Order of Operations, you would
complete the equation left to right, doing which
ever one appears first, Addition or Subtraction.
+ Addition is adding numbers together.
+ The symbol for addition is +.
Example: 6 + 9 = 15

9. + Subtraction is taking away a specific number.
+ The symbol for subtraction is -.
Example: 17 – 8 = 9