Respuesta:
1) ( -5 ) . ( -3 ) = 15
2) ( -6 ) . ( 0 ) . ( -12 ) = 0
3) ( 4 + 5 ) . ( - 2 - 1 ) = ( 9 ) × ( - 3 ) = - 27
4) ( 3 + 15 ) - ( 21 - 6 ) = 18 - 15 = 3
5) - 48 - (-6) = -48 + 6 = -42
6) ( 35 + 5 ) ÷ -9 = 40 ÷ - 9 = 4,444444444
7) ( -7 × -9 ) ÷ 7 = 63 ÷ 7 = 9
8) ( 2 ) . ( 0 ) . ( 1 ) = 0
