3 5/9-1 8/15= 3 25/45 - 54/45 = 2 70/45- 54/45 = 2 16/45
7 11/18-5 11/12= 7 22/36 - 5 33/36 = 6 58/36 - 5 33/36 = 1 25/36
9 5/12-4 13/20= 9 25/60 - 4 39/60 = 8 85/60 - 4 39/60 =4 46/60 = 4 23/30
7 1/7-4 5/6= 7 6/42 - 5 35/42 = 6 48/42 - 5 35/42 = 1 13/42
46 5/6- 27 19/21= 46 35/42 - 27 38/42 = 45 77/42 - 27 38/42 = 18 39/42
51 3/22-19 5/33= 51 9 / 66 - 19 10 / 66 = 50 75 / 66 - 19 10/66 =
31 65/ 66
42 4/15-16 8/9= 42 12/45 - 16 40/45 = 41 57/45 - 16 40/45 = 25 17/45
65 3/8-48 4/5= 65 15/40 - 48 32/40 = 64 55/40 - 48 32/40 = 16 23/40
sprowadzałam do wspólnego mianownika :)
