The document discusses BIDMAS/BODMAS/PEDMAS, which are acronyms that represent the order of operations in mathematics. It explains that B/P stands for brackets/parentheses, I/O/E/P stands for indices/orders/exponents/powers, D/M stands for division and multiplication, and A/S stands for addition and subtraction. Several practice equations are included to demonstrate applying the proper order of operations. The document also notes that different regions may use varying acronyms but they all refer to the same concept of resolving equations in a set sequence.

1. BIDMAS
How to read equations

2. BIDMAS, BODMAS, PEDMAS?
• The above terms all refer to the same
thing, an order in which equations are
read.
• An equation is an sum which has not yet
been resolved.
• Over the next couple of slides we will look
at what each of the letters represents.

3. B or P
• B stands for Brackets.
• P stands for Parenthesis.
• Both these terms have exactly the same
meaning and refer to anything contained
between ( and ).
• (2 + 3)2 and 2 + 32 produce quite
different results.

4. Powers (I, O or E)
• I stands for Indices.
• O stands for Orders.
• E stands for Exponents.
• Given the title you could use P as well but
again, these all refer to the same type of
calculation.
• 2 x 62 using this method would equal 72

5. D and M
• Quite simply this refers to Division and
Multiplication.
• Division doesn’t take precedence over
Multiplication and the order of the letters
is for pronunciation of the acronym.
• To avoid confusion division can be thought
of as simply being the multiplication of a
fraction.

6. A and S
• Here we have the initials of Addition and
Subtraction.
• Addition does not take precedence over
Subtraction, both are of equal precedent and
as with multiplication and division should be
calculated from left to right.
• To try and avoid confusion subtraction could
be thought of as the addition of negative
numbers.

7. So… ?
• Choose the term that feels right for you to
help you remember the appropriate order
of operators.
• Some people choose the term that they
can remember the most easily, some
prefer to remember a term that relates to
the operator names they prefer.
• All the Acronyms are equally valid.

8. Acronyms
• BODMAS – Generally used in the UK and derived
from the original acronym used before powers
were introduced.
• BIDMAS – Another acronym used commonly in the
UK and US.
• PEDMAS – This is the preferred Canadian
acronym.
• PEMA – The New Zealand acronym where division
is thought of as a type of multiplication and
subtraction as a type of addition.

9. Practice Exercises
• 2 x 2 + 5 x 3
• 3 x 4 x 2 + 1
• 2 + 4 x 3 – 2
• 5 ÷ (22 – 3)
• 2 – 4 + 3 – 1
• 3 x 4 ÷ 6 x 5
• 32 – 2 x 2
• ((2 – 1) x 5)2 – 3 x 5

10. Practice Exercises
• 2 x 2 + 5 x 3
• 3 x 4 x 2 + 1
• 2 + 4 x 3 – 2
• 5 ÷ (22 – 3)
• 2 – 4 + 3 – 1
• 3 x 4 ÷ 6 x 5
• 32 – 2 x 2
• ((2 – 1) x 5)2 – 3 x 5
• 19
• 25
• 12
• 5
• 0
• 10
• 5
• 10

11. Practice Exercises
• Insert the brackets to correct the equation:
• 2 + 3 x 4 = 20
• 12 ÷ 7 – 1 = 2
• 2 + 12 = 9
• 12 – 3 x 22 = 36
• 25 ÷ 5 – 4 – 3 = 4
• 17 – 2 ÷ 5 = 3

12. Practice Exercises
Insert the brackets to correct the equation:
(2 + 3) x 4 = 20
12 ÷ (7 – 1) = 2
(2 + 1)2 = 9
(12 – (3 x 2))2 = 36
25 ÷ 5 – (4 – 3) = 4
(17 – 2) ÷ 5 = 3

13. So what is the order?
• B or P?
• Brackets or Parenthesis
• O, I, E or P?
• Orders, Indices, Exponents or Powers
• D and M or M?
• Division and Multiplication or Multiplication
• A and S or A?
• Addition and Subtraction or Addition