Szczegółowe wyjaśnienie:
1/2 + 1/6 =2/3
X +1/6 =9/8 X =23/24
2/3 + 1/6 = 5/6
X +1/6 = 1/3 x =1/6
5/6 + 1/6 = 6/6 =1
X +1/6 = 1 1/2 x = 1 2/6 lub 1 1/3
2 1/12 + 1/6 = 2 3/12 lub 2 1/4
1/3 - 1/8 = 8/24 - 3/24 =5/24
X - 1/8 = 1/2 x = 5/8
11/12 - 1/8 = 22/24 - 3/24 = 19/24
X - 1/8 = 2/3 x = 19/24
1 1/4 - 1/8 = 1 1/8
X - 1/8 = 2 1/4 x =2 3/8
7 - 1/8 =6 7/8
X - 1/8 = 5/9 x = 49/72
3 3/8 - 1/8 = 3 2/8 lub 3 1/4
