Question

Решите пожалуйста поэтапно. Даю 20 баллов

(5.07 : 1/20 - 23.4 : 13/50) * 1/4 + 0,074 * 1/2

Answer 1

=
$(5 \frac{7}{100} \div \frac{1}{20} - 23\frac{4}{10} \div \frac{13}{50} ) \times \frac{1}{4} + \frac{74}{1000} \times \frac{1}{2} = ( \frac{507}{100} \times \frac{20}{1} - \frac{234}{10} \times \frac{50}{13} ) \times \frac{1}{4} + \frac{74}{2000} = (\frac{507}{5} - 18 \times 5) \times \frac{1}{4} + \frac{74}{2000} = \frac{507 - 18 \times 5 \times 5}{5} \times \frac{1}{4} + \frac{37}{1000} = \frac{57}{20} + \frac{37}{1000} = \frac{57 \times 50 + 37}{1000} = \frac{2887}{1000} = 2.887$