Question

45-{ [ ( 120-60) : 15 +6 ]:2}

Answer 1

45 - { [ ( 120-60) : 15 +6 ] : 2 }

= 45 - { [ 60 : 15 + 6 ] : 2 }

= 45 - { [ 4 + 6 ] : 2 }

= 45 - 10 : 2 

= 45 - 5 

= 40

Answer 2

45-{[(120-60):15+6]:2}

=45-{[60:15+6]:2}

=45-{[4+6]:2}

=45-{10:2}

=45-5

=40

Answer 3

=45-{[60:15+6]:2}

45-{[4+6]:2}

45-{[10:2}

45-5

=40