Question

(+1/12) + (-1/3) + (+1/4) + (-1/6)=

Answer 1

(1/12) + (-1/3) + (1/4) + (-1/6)=

1/12 - 1/3 + 1/4 - 1/6=

1/12 - 4/12 + 3/12 - 2/12=

1-4+3-2/12=

-3+1/12=

-2/12=

Simplificando (:2) =

-1/6