Question

Сумма 2/0,9 + 5/1,8 скольки равна ?

Answer 1

$\frac{2}{0.9} + \frac{5}{1.8} = \frac{2*2}{0.9*2} + \frac{5}{1.8} = \frac{4}{1.8}+ \frac{5}{1.8} = \frac{4+5}{1.8} = \frac{9}{1.8} = \frac{90}{18} =5$