1/6 + 2/5 = 5/30 + 12/30 = 17/30
8/9 - 5/6 = 16/18 - 15/18 = 1/18
1 1/5 + 8 1/7 = (1+8) + (7/35 + 5/35) = 9+12/35 = 9 12/35
4 7/10 - 2 1/3 = (4-2) + (21/30 - 10/30) = 2+ 11/30 = 2 11/30
4 1/5 - 7/10 = 21/5 - 7/10 = 42/10 - 7/10 = 35/10 = 7/2
6 1/8 - 2 3/4 = 49/8 - 11/4 = 49/8 - 22/8 = 27/8 = 3 3/8
10 2/3 - 6 7/9 = 32/3 - 61/9 = 96/9 - 61/9 = 25/9 = 3 8/9
9 3/8 - 2 5/6 = 75/8 - 17/6 = 225/24 - 68/24 = 157/24 = 6 13/24
powinno być wszystko dobrze ale nie odetne se ręrki
