Question

решите эти два номера пж​

Answer 1

$a)6 \frac{3}{4} - 2 \frac{5}{6} - 1 \frac{3}{8} \\ \frac{27}{4} - 2 \frac{5}{6} - 1 \frac{3}{8} \\ \frac{61}{24} = 2 \frac{13}{24} \\ b)9 \frac{8}{15} - 4 \frac{1}{12} + 3 \frac{7}{20} \\ 9 + \frac{8}{15} - (4 + \frac{1}{12} ) + 3 + \frac{7}{20} \\ 9 + \frac{8}{15} - 4 - \frac{1}{12} + 3 + \frac{7}{20} \\ (9 - 4 + 3) + ( \frac{8}{15} - \frac{1}{12} + \frac{7}{20}) \\ 8 + \frac{4}{5} = 8 \frac{4}{5}$