Question

Qual valor da expressão? + 3/5 + 1/2 - 3/4 + 1/10 - 5/8

Answer 1

 + 3/5 + 1/2 - 3/4 + 1/10 - 5/8 =    

mmc
5, 2, 4, 10, 8 / 2
5, 1, 2,   5, 4 / 2
5, 1, 1,   5, 2 / 2
5, 1, 1,   5, 1 / 5
1, 1, 1,   1, 1 / =   2 . 2 . 2 . 5 = 40

   + 3/5   + 1/2        - 3/4        + 1/10    - 5/8 =  
   8.3/40 + 20.1/40 - 10.3/40 + 4.1/40 - 5.5/40 =
   24 + 20 - 30 + 4 - 25 / 40 =
   +48 - 55 / 40 =
   - 7/40