Question

(-1+1/2)-(-1/6+2/3)=​

Answer 1

(-1 +1/2)-(-1/6 +2/3)=

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

(-3/6) - ( 3/6)

-6/6

-1

Answer 2

(-1 + 1/2) - (-1/6 + 2/3)

-2/2 + 1/2 = -1/2

-1/6 + 4/6 = 3/6 = 1/2

portanto

-1/2 -  1/2 = -1