spróbuj na kalkulatorze ale najpierw musisz zamienic ulamki zwykle na dziesietne
6 1/2 + 2,75 = 13/2 + 2 3/4 = 13/2 + 11/4 = 26/4 + 11/4 = 37/4 7,8 - 5 5/6 = 78/10 - 35/6 = 91/2 = 45 1/2 7,8 : 5,6 = 78/10 : 56/10 = 78/10 x 10/56 = 39/10 x 10/14 = 39/14 = 2 11/4 3,7 x 4,2 = 37/10 x 42/10 =37/5 x 21/10 = 37/5 x 21/10 = 777/50 = 15 27/50 8/11 x 9,9 = 8/11 x 99/10 = 4/1 x 9/5 = 36/5 = 7 1/5 1/3 x 1,5 + 2,5 = 1/3 x 15/10 + 2,5 = 5/10 + 2,5 = 5/10 + 25/10 = 30/10 = 3 1 1/4 x 1/5 - 0,2 = 5/4 x 1/5 - 0,2 = 1/4 - 0,2 = 1/4 - 2/10 = 10/40 - 8/40 = 2/40 = 1/20 x 5 = 5/100 = 0,05 2,4 x 1/3 + 4,8 : 2 2/5 = 24/10 x 1/3 + 48/10 : 2 2/5 = 8/10 + 48/10 : 12/5 = 8/10 + 48/10 x 5/12 = 8/10 + 4/2 x 1/1 = 8/10 x 4/2 = 8/5 = 1 3/5 4 - (2,5 - 1 1/5) x 9/13 = 4 - (2 5/10 - 1 1/5) x 9/13 = 4 - (25/10 - 6/5) x 9/13 = 4 - 15/5 x 9/13 =