Odpowiedź:
6 3/5 + 4 4/7 = 6 21/35 + 4 20/35 = 10 41/35 = 11 6/35
2 1/9 + 5/6 = 5 2/18 + 15/18 = 5 17/18
12 4/10 - 3/5 = 12 4/10 - 6/10 = 11 14/10 - 6/10 = 11 8/10 = 11 4/5
9 1/3 - 3 5/8 = 9 8/24 - 3 15/24 = 8 32/24 - 3 15/24 = 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 = 21/3 = 7
