9/10 и 5/13=117/130 и 50/130
13/12 и 13/18= 39/36 и 26/36
9/10 и 5/12 = 54/60 и 25/60
13/12 и 13/18 = 39/36 и 26/36
9/10 и 5/13=117/130 и 50/130
13/12 и 13/18= 39/36 и 26/36
9/10 и 5/12 = 54/60 и 25/60
13/12 и 13/18 = 39/36 и 26/36