svetazuna а)
1 1/2 - 1/6 = 3/2 - 1/6 = 9/6 - 1/6 = 8/6 = 4/3 = 1 1/3,
б)
1 1/4 - 1/2 = 5/4 - 1/2 = 5/4 - 2/4 = 3/4,
в)
1 1/5 - 1/4 = 6/5 - 1/4 = 24/20 - 5/20 = 19/20