Question

a) (+3/7)+(-4/5) =
b) (-1/4)-(2/3) =

Answer 1

Resposta:

a) (+3/7)+(-4/5) =

$\frac{3}{7} - \frac{4}{5} \\ \\ \frac{15 - 28}{35} \\ \\ - \frac{13}{35}$

b) (-1/4)-(2/3) =

$- \frac{1}{4} - \frac{2}{3} \\ \\ \frac{ - 3 - 8}{12} \\ \\ - \frac{11}{12}$