Question

Não consegui chegar a um resultado convincente... me ajudem 1/2.(1/5+1/2.1/3)-1/5.(1/6+1/2.1/5)=

Answer 1

1/2 . (1/5+ 1/2.1/3) - 1/5 . (1/6+1/2.1/5)
1/2 . (2/10 + 5/10 . 1/3) -1/5. (1/6+1/2.1/5)
1/2 . (7/10. 1/3) -1/5 .(1/6+1/2.1/5)
1/2. 7/30 -1/5 .(1/6+3/6.1/5)
1/2. 7/30 -1/5. (3/6. 1/5)
1/2. 7/30 -1/5. 3/30
7/60 -1/5.3/30
7/60 -3/150
Resposta: 29/300