В двух строительных бригадах 88 человек.

1) 7/9 + 10/45 ... 17/38 + 3/19; 35/45 + 10/45 ... 17/38 + 6/38; 45/45 ... 23/38; 1 > 23/38

2) 9/20 - 11/30 ... 13/33 - 1/22; 27/60 - 22/60 ... 26/66 - 3/66; 1/12 ... 23/66; 11/132 < 46/132

3) 7/8 - 7/20 ... 13/24 - 7/16; 70/80 - 28/80 ... 26/48 - 21/48; 21/40 > 5/48

4) 4/24 + 7/8 ... 3/48 + 5/6; 1/8 + 7/8 ... 3/48 + 40/48; 1 > 43/48