Question

Determine o valor de: 2/5 + 7/8 - 9/6 + 5/4 *

Answer 1

Resposta:

$\frac{2}{5}+\frac{7}{8}-\frac{9}{6}+\frac{5}{4}\\\\=\frac{16}{40}+\frac{35}{40}-\frac{60}{40}+\frac{50}{40}\\\\\mathrm{Aplicar\:as\:propriedades\:das\:fracoes}:\quad \frac{a}{c}\pm \frac{b}{c}=\frac{a\pm \:b}{c}\\\\=\frac{16+35-60+50}{40}\\\\\mathrm{Somar:}\:16+35-60+50=41\\\\=\frac{41}{40}$