Question

Resolva a expressão 7/2 ÷ 21/6 - 7/8 + 9/10 × 5/6

Answer 1

$\frac{ \frac{7}{2} }{ \frac{21}{6} } - \frac{7}{8} + \frac{9}{10} . \frac{5}{6} \\ \\ \frac{7}{2} . \frac{6}{21} - \frac{7}{8} + \frac{9}{10}. \frac{5}{6} \\ \\ \frac{3}{3} - \frac{7}{8} + \frac{3.1}{2.2} \\ \\ 1- \frac{7}{8} + \frac{3}{4} \\ \\ \frac{8-7+6}{8} = \frac{7}{8}$

Espero ter ajudado.