(0,5 : 1,25 + 1,4 * 7/11 - 3/11) * 4 1/8 = 4 1/5
1) 0,5 : 1,25 = 0,4
2) 1,4 * 7/11 = 14/10 * 7/11 = 7/5 * 7/11 = 49/55
3) 0,4 + 49/55 = 4/10 + 49/55 = 2/5 + 49/55 = 22/55 + 49/55 = 71/55 = 1 16/55
4) 1 16/55 - 3/11 = 1 16/55 - 15/55 = 1 1/55
5) 1 1/55 * 4 1/8 = 56/55 * 33/8 = (7*3)/(5*1) = 21/5 = 4 1/5