Question

помогите решить номер 19 1,2пример

Answer 1

2,1 - 62/10*(3/31) = 2,1 - (62/31)*(3/10) = 2,1 - 6/10 = 1,5 - ответ

Answer 2

$\frac{2}{47} \times 9.4 + 5.6 = \frac{2}{47} \times \frac{47}{5} + \frac{28}{5} = 2 \times \frac{1}{5} + \frac{28}{5} = \frac{2}{5} + \frac{28}{5} = 6 \\ \\ - - - - - - - - - \\ \\ 2.1 - 6.2 \times \frac{3}{31} = \frac{21}{10} - \frac{31}{5} \times \frac{3}{31} = \frac{21}{10} - \frac{1}{5} \times 3 = \frac{21}{10} - \frac{3}{5} = 1.5$