Question

Помогите пожалуйста с алгеброй

Answer 1

Ответ:

$1) \frac{(5.2 - 1.4) \div \frac{3}{70} }{(2.7 - 0.8) \times 2 \frac{1}{3} } = \frac{3.8 \div \frac{3}{70} }{1.9 \times \frac{7}{3} } = \frac{38 \times 70}{10 \times 3} \div \frac{19 \times 7}{10 \times 3} = \frac{38 \times 70 \times 10 \times 3}{10 \times 3 \times 19 \times 7} = \frac{38 \times 70}{19 \times 7} = 20$

$2) \frac{(2 \frac{1}{6} + 4.5) \times 0.35 }{(2.75 - 1.5) \div 2 \frac{19}{28} } = \frac{(2 \frac{1}{6} + 4 \frac{3}{6} ) \times 0.35}{1.25 \div \frac{75}{28} } = \frac{8 \frac{2}{3} \times \frac{7}{20} }{ \frac{5}{4} \div \frac{75}{28} } = \frac{20 \times 7}{3 \times 20} \div \frac{5 \times 28}{4 \times 75} = \frac{7}{3} \div \frac{7}{15} = \frac{7 \times 15}{3 \times 7} = 5$