Question

find the value of
give me the full method

Answer 1

30+(-23)+(-63)+55

=(30+55)+(-23-63)

=85+(-(23+63))

=85-86

=-1

Answer 2

$\huge\bf\pink{Hey \: there!!}$




Using identity

'+' '-' = -

' -' ' +' = -

' - ' ' - ' = +



Refer to the attachment above for your solution




Hope it helps!