528.
1. 3 70/61
2. 11 329/300
3.6 507/401
4. 22 560/540
529.
1. 5 19/34+82 83/180=6 19/34+80 17/34=86 36/34
2. 6 3/35+3 59/70= 6 6/70+3 59/70=9 65/70
3. 47 211/360+82 83/180=47 211/360+82 166/360=129 377/360
4. 92 19/240+5 109/120= 92 19/240+5 218/240= 97 237/240