👤

Calculati : -1/2-[-1/5+(2-1/3)]

Răspuns :

-1/2-[-1/5+(2-1/3)] =

= -1/2 - [-1/5 + (2×3 - 1)/3] =

= - 1/2 - (-1/5 + 5/3) =

= -1/2 - (-1 ×3/15 + 5×5/15) =

= -1/2 - (-3/15 + 25/15) =

= - 1/2 - 22/15 =

= -1×15/30 - 22×2/30 =

= - 15/30 - 44/30 =

= - 59/30