BODMAS Revision Quiz P2: Maths
BODMAS (also known as BIDMAS or PEMDAS) is an acronym that stands for Brackets, Order (or Indices), Division, Multiplication, Addition and Subtraction. It is a set of rules that dictate the order in which mathematical operations should be carried out to get the correct answer. These rules are essential because, with them, there can be clarity in the order of calculations, which could result in different answers.
Let us go through each letter of BODMAS in more detail:
For example, in the expression 2 × (3 + 4), the calculation inside the brackets (3 + 4) should be done first, giving a result of 7. Then, we can multiply 2 by 7, giving a final answer of 14.
Example: Simplify the expression 2 × (3 + 4) - 5
Solution: First, we need to calculate inside the brackets: 3 + 4 = 7. Then, we multiply 2 by 7, giving 14. Finally, we subtract 5 from 14, giving a final answer of 9.
Example: Simplify the expression 3² + 4³
Solution: First, we calculate 3², which is 9. Then, we calculate 4³, which is 4 × 4 × 4 = 64. Finally, we add 9 and 64, giving a final answer of 73.
Example: Simplify the expression 10 ÷ 2 × 4
Solution: First, we divide 10 by 2, giving 5. Then, we multiply 5 by 4, giving a final answer of 20.