Bonjour,
30/6 = 5
7/-5 = -21/15
1/8 + 12/8 -15/8 + 2/8 = 0/8
8/3 * 9/2 = 72/ 6 = 12
6*(1/3 +5) =
6* ( 5/15 + 75/15) =
6* 80/15 = 480/ 15=32
1/6 + 3/5 =
5/30 + 18/30 =
23/30