а) (4,38+ 6,05)/2=5,215.
б) (0,39+9,42+3,41)/3=13,22/3=1322/300=661/150=4 61/150.
в) (6,07+12,41+ 2,011)/3=20,491/3=20491/3000=6 2491/3000.
г) (1,02+ 1,15+1,3+1,4).4=1,2175.
д) (22,4+36,7+56,2)/3=115,3/3=1153/30=38 13/30.
е) (0,203+ 0,324+ 2,61)/3=3,137/3=3137/3000=1 137/3000