Question

como resolver 1+1/2*5/4-2/3*(5/2-2/5)

Answer 1

1 + 1 * 5 - 2 * (5 - 2) =
      2   4   3    2   5
1 + 5 - 2 * (5 - 2) =
      8   3    2   5
mmc (2, 5) = 10
1 + 5 - 2 * (25 - 4) =
      8   3       10
1 + 5 - 2 * 21 =
      8   3   10
1 + 5 - 42 =   1 + 5 - 7
      8   30            8   5
mmc (8, 5) = 40
40 + 25 - 56 =
       40
9  =
40