Question

Математика, помогите!

Answer 1

Ответ:

$2 \frac{4}{13} \times ( \frac{3}{8} - \frac{4}{15} ) - 11 \div 5 \frac{1}{2} \\ \frac{30}{13} \times ( \frac{45 - 32}{120} ) - 11 \div \frac{11}{2} = \frac{30}{13} \times \frac{13}{120} - \frac{11 \times 2}{11} = \frac{30 \times 13 }{13 \times 120} - 2 = \frac{1}{4} - 2 = \frac{1}{4} - 1 \frac{4}{4} = \frac{1}{4} - \frac{8}{4} = = - \frac{7}{4} = - 1.75$