б) Выполним действия:
$$1) 0,2 * 6,2 = 1,24$$
$$2) 1,24 : 0,31 = 4$$
$$3) \frac{5}{6} * 0,3 = \frac{5}{6} * \frac{3}{10} = \frac{15}{60} = \frac{1}{4} = 0,25$$
$$4) 4 - 0,25 = 3,75$$
$$5) 1\frac{4}{11} = \frac{1 * 11 + 4}{11} = \frac{15}{11}$$
$$6) 2 + \frac{15}{11} = \frac{2 * 11 + 15}{11} = \frac{37}{11}$$
$$7) \frac{37}{11} : 0,22 = \frac{37}{11} : \frac{22}{100} = \frac{37}{11} * \frac{100}{22} = \frac{3700}{242} = \frac{1850}{121} = 15 \frac{35}{121}$$
$$8) 15\frac{35}{121} : 0,01 = \frac{1850}{121} : \frac{1}{100} = \frac{1850}{121} * 100 = \frac{185000}{121} = 1528,93$$
$$9) 3,75 : 1528,93 = 0,00245$$
Ответ: 0,00245.