Odpowiedź:
6 3/5+ 4 4/7= 33/5 + 32/7 = 231/35 + 160/35= 481/35 =13 31/35
5 1/9+ 5/6= 46/9 + 15/18 = 92/18 + 15/18 = 107/18= 5 17/18
12 4/10 - 3/5= 124/10 - 6/10 = 118/10= 11 8/10= 11 4/5
9 1/3- 3 5/8= 28/3 - 29/8= 224/24 - 87/24 = 137/24 = 5 17/24
7/12 * 4/5 = 7/3 * 1/5 = 7/15
4 6/9 * 1 1/2= 42/9 * 3/2 = 21/3 * 1/1= 21/3 = 7
24/25 : 8/15 = 24/25 * 15/8= 3/5 * 3/1= 9/5 = 1 4/5
