Question

помогите пожалуйста срочно по матем а) и б) пж
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Answer 1

$a) \frac{(15 - 9 \frac{1}{3} )\div \frac{2}{3} }{(19 \frac{2}{3} - 11 \frac{7}{9} ) \times \frac{9}{71} } - 8.45 = \frac{5 \frac{2}{3} \div \frac{2}{3} }{(19 \frac{6}{9} - 11 \frac{7}{9} ) \times \frac{9}{71} } - 8.45 = \\ \\ = \frac{ \frac{17 \times 3}{3 \times 2} }{ \frac{71}{9} \times \frac{9}{71} } - 8.45 = \frac{17}{2} - 8.45 = 8.5 - 8.45 = 0.05$

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$b) \frac{(11.81 + 8.19) \times 0.02}{9 \div 11.25} + 3.35 = \frac{20 \times 0.02}{9 \div 11.25} + 3.35 = \\ \\ = \frac{0.4}{0.8} + 3.35 = 0.5 + 3.35 = 3.85 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$