[(26 2/3 : 6,4) * (19,2 : 3 5/9) - 8 4/7 : 2 26/77] / [0,5 : 18 2/3 * 11] - 1/18 =
= 63 целых 19/22
1) 26 2/3 : 6,4 = 80/3 : 64/10 = 80/3 * 10/64 = (5*10)/(3*4) = 50/12
2) 19,2 : 3 5/9 = 192/10 : 32/9 = 192/10 * 9/32 = (6*9)/(10*1) = 54/10
3) 50/12 * 54/10 = (5*9)/(2*1) = 45/2 = 22 1/2
4) 8 4/7 : 2 26/77 = 60/7 : 180/77 = 60/7 * 77/180 = (1*11)/(1*3) = 11/3 = 3 2/3
5) 22 1/2 - 3 2/3 = 22 3/6 - 3 4/6 = 21 9/6 - 3 4/6 = 18 5/6
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6) 0,5 : 18 2/3 = 1/2 : 56/3 = 1/2 * 3/56 = 3/112
7) 3/112 * 11 = 33/112
- - - - - - -
8) 18 5/6 : 33/112 = 113/6 * 112/33 = (113*56)/(3*33) = 6328/99 = 63 91/99
9) 63 91/99 - 1/18 = 63 182/198 - 11/198 = 63 171/198 = 63 19/22