a) 4,6 = 4 целых 6/10 = 4 целых 3/5 = $$\frac{23}{5}$$
б) 56,01 = 56 целых 1/100 = $$\frac{5601}{100}$$
в) 108,056 = 108 целых 56/1000 = 108 целых 7/125 = $$\frac{13507}{125}$$
д) 0,000006 = 6/1000000 = 3/500000 = $$\frac{3}{500000}$$
г) 19,45 = 19 целых 45/100 = 19 целых 9/20 = $$\frac{389}{20}$$
e) 601,43021 = $$\frac{60143021}{100000}$$