Question

b) 45 - { 4 [ ( 9 . 12 - 14 . 7 ) : ( 15 - 5 . 2 ) ] } =__

Answer 1

=45-{4 [(108-98):(15-10)]}
=45-{4 [(10:5)]}
=45-{4.2}
=45-8
=37