Sagot :
Bonjour,
5/7 + 13/7 = (13 + 5)/7 = 18/7.
2/3 - 8/3 = (2 - 8)/3 = -6/3 = -2.
5/3 + 15/2 = 10/6 + 45/6 = 55/6.
3/7 + 4/3 = 9/21 + 28/21 = 37/21.
-12/5 + 28/2 = -24/10 + 140/10 = 116/10 = 58/5.
-5/3 - 3/4 = -20/12 - 9/12 = -29/12.
5/2 + 4/3 - 5/6 = 15/6 + 8/6 - 5/6 = 23/6 - 5/6 = 18/6 = 3.