1)
7\16-11\42-9\16+17\42=1/56
7/16-9/16=-2/16=-1/8
17/42-11/42=6/42=1/7
1/7-1/8=(8-7)/56=1/56
2)
-3 целые 5\11+1целая 3\8+2целые 5\6-4целые 6\11
-3 5/11-4 6/11=-8
1 3/8+2 5/6=3 (9+20)/24=4 5/24
4 5/24-8=-3 19/24
3)
-1,23+2,14+7,38-5,77+1,62
-1,23-5,77=-7
7,38+1,62=9
9-7+2,14=4,14
4)
-9,39+0.74-10,61+3,26+6,25
-9,39-10,61=-20
0,74+3,26=4
-20+4+6,25=-9,75