Rule: The simplification is done in following order: Bracket, off, division, multiplication, addition and at last subtraction. It is famously called as BODMAS.
BODMAS
B -> bracket. It can be [], {}, ()
O -> off
D -> division
M -> multiplication
A -> addition
S -> subtraction
The simplification is done in order of BODMAS.
Exercise
Find the value of 1 ÷ [ 1 + ÷ { 1 + 1 ÷ ( 1 + 1 ÷ 2) } ].