Question

calcular expressoes
6 -5 + 1
7 3 5

Answer 1

6/7 - 5/3 + 1/5
MMC = 7 - 3 - 5 | 3
             7   1   5 | 5
             7   1   1 | 7
             1    1   1
MMC = 3. 5 . 7 = 105
6/7/15 - 5/3/35 + 1/5/21 =

90/105 - 175/105 + 21/105 =
- 85/105 + 21/105 = - 64/105