Do each bit in the brackets first (remembering that the line is the same as a divide sign and applying BIDMAS) so

(20 ÷ 4) ÷ (5 - 4 x 2) = 5 ÷ (5 - 8) = 5 ÷ -3 =

Apply BIDMAS and understand that '/' means to divide .

Remember BIDMAS tells us in which order to do our calculation:

Brackets first, then Indices, then Division, then Multiplication, then Addition, then Subtraction.

(20/4)/(5-4x2) means (20 ÷ 4) ÷ (5 - 4 x 2)

Deal with the brackets first:

(20 ÷ 4) becomes 5

(5 - 4 x 2) becomes (5-8) which becomes -3

therefore (20 ÷ 4) ÷ (5 - 4 x 2) becomes 5 ÷ - 3 which =

(20/4)/(5-4x2)

Using BIDMAS, B (brackets) comes first so we need to expand the brackets:

20/4 = 5

M (multiplication) comes before S (subtraction) so we need to multiply 4 by 2 before taking it away from 5:

4 x 2 = 8

5 - 8 = -3

Now we divide:

5 / -3 = - 5/3 or -1(2/3)