Practising using the BIDMAS rule

curriculum-key-fact
BIDMAS: Brackets, Indices, Division and Multiplication, Addition and Subtraction

Try and find the answers to these questions.

Question

Q1. Work out the value of the following:

a) 4 \times 5 - 3 \times 2

b) (2 + 3) \times (5 - 1)

c) 2 + 6 \div 2

d) 8 - (6 - 1)

e) 3 \times (4 + 2)

a) In BIDMAS multiplication comes before subtraction, so work out the multiplication first and then do the subtraction: 4 \times 5 - 3 \times 2 = 20 - 6 = 14

b) Brackets come first, so:

(2 + 3) \times (5 - 1) = 5 \times 4 = 20

c) In BIDMAS, division comes before addition, so:

2 + 6 \div 2 = 2 + 3 = 5

d) Brackets come first, so:

8 - (6 - 1) = 8 - 5 = 3

e) BIDMAS states that brackets come before multiplication, so work out the bracket first: 3 \times (4 + 2) = 3 \times 6 = 18

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