Odpowiedzi

2009-10-01T15:15:52+02:00
Minus pięc i cztery siudme + siedem = (-5-4/7)+7 = 1+3/7
2009-10-01T15:23:53+02:00
-5 i 4/7 + 7 = -39/7 + 49/7= 10/7= 1 i 3/7
2009-10-01T15:55:04+02:00