Nombres enters-2

1) Resol:
( + 5 ) + ( + 3 ) = ( - 8 ) + ( - 5 ) = ( - 3 ) + ( + 9 ) = (- 2 ) + ( - 15) =
( - 1 ) + ( + 7 ) = ( - 5 ) + ( + 0 ) = ( - 5 ) + ( + 5 ) = ( - 4 ) + ( - 4 ) =
( + 5 ) - ( + 3 ) = ( - 8 ) - ( - 5 ) = ( - 3 ) - ( + 9 ) = ( - 2 ) - ( - 15 ) =
( - 1 ) - ( + 7 ) = ( - 8 ) - ( + 0 ) = ( - 5 ) - ( + 5 ) = ( - 4 ) - ( - 4 ) =
2) Resol aquestes operacions combinades amb nombres enters:
a) - 30 + 8 - ( - 5 ) + 1 - 5 - ( -3 ) + ( - 7 ) =
b) - 4 + ( - 2 + 1 ) + 5 - [ 3 - ( 1 - 2 ) + 4 ] + 1 - 2 =
c) - 19 + ( - 4 ) - ( - 8 ) + ( - 13 ) - ( - 12 ) + 4 - 57 =
d) 3 - [ - 2 + 1 - ( 4 - 5 - 7 ) ] - 2 + [ - 3 - ( 5 - 6 - 1 ) + 2 ] =
e) - 8 + ( - 2 ) - ( - 10 ) - 2 + 5 =
f) ( 3 - 8 ) + ( - 5 - 2 ) - ( -9 + 1 ) - ( 7 - 5 ) =