como resolver estas operaciones
a) 8 + (5 + 3) =16
b) (12 + 15) + (3 + 2 + 1) + 4 (5 + 3 + 2 + 8) =
c) 150 – [18 + (5 – 3) + (6 – 2)] =
d) (15 + 2) – (6 + 2) =
e) (17 – 3) – (11 – 3) =
f) [(6 – 4) – (3 – 2)] – [(9 – 7) – (6 – 5)] =
g (14 + 6 – 4) – (9 – 7 – 2) =