Ответ:
3 1/20 = 3,05
2 3/50 = 3,06
4 8/25 = 4,32
7 11/20 = 7,55
12 4/25 = 12,16
9 13/50 = 9,26
5,17+2,06×1,5=5,17+3,09=8,26