Question

Найдите ответ х в прогрессии

Answer 1

1)
$\frac{152}{10} \times \frac{1}{4} - \frac{4851}{100} \div \frac{147}{10} = \frac{38}{10} - \frac{4851}{100} \times \frac{10}{147} = \frac{38}{10} - \frac{33}{10} = \frac{5}{10} = 0.5$
2)
$( \frac{13}{44} - \frac{2}{11} - \frac{5}{66} \div 2 \frac{1}{2} ) \times 1 \frac{1}{5} = ( \frac{13}{44} - \frac{2}{11} - \frac{5}{66} \div \frac{5}{2} ) \times \frac{6}{5} = ( \frac{13}{44} - \frac{2}{11} - \frac{5}{66} \times \frac{2}{5} ) \times \frac{6}{5} = ( \frac{13}{44} - \frac{2}{11} - \frac{1}{33} ) \times \frac{6}{5} = ( \frac{39}{132} - \frac{24}{132} - \frac{4}{132} ) \times \frac{6}{5} = \frac{11}{132} \times \frac{6}{5} = \frac{1}{12} \times \frac{6}{5} = \frac{1}{10} = 0.1$
3)
$\frac{32}{10} + \frac{8}{10} ( \frac{55}{10} - \frac{13}{4} ) = \frac{16}{5} + \frac{4}{5} ( \frac{11}{2} - \frac{13}{4} ) = \frac{16}{5} + \frac{4}{5} ( \frac{22}{4} - \frac{13}{4} ) = \frac{16}{5} + \frac{4}{5} \times \frac{9}{4} = \frac{16}{5} + \frac{9}{5} = \frac{25}{5} = 5$
4) x = 0,5*5/0,1 = 25
Ответ: B) 25