a) 2 × ( 3 - 16 ) = 2 × ( - 13 ) = - 26 ;
d) ( - 3 ) × ( - 15 ) + 4 = + 45 + 4 = + 49 ;
g) 10 × ( - 12 - 9 + 5 ) = 10 × ( - 21 + 5 ) = 10 × - 16 = - 160.
