Question

ayuda porfavor es para hoy ​

Answer 1

1. Efectúa

A)

$\frac{9}{4} -\frac{6}{4}=\frac{9-6}{4} =\frac{3}{4}$

B)

$\frac{7}{8} +\frac{6}{8} =\frac{7+6}{8} =\frac{13}{8}$

C)

$\frac{5}{8}-\frac{4}{8} =\frac{5-4}{8} =\frac{1}{8}$

D)

$\frac{12}{18} +\frac{3}{18}=\frac{12+3}{18}=\frac{15}{18}=\frac{5}{6}$

$----------------------------------$

2. Opera

A)

$\frac{5}{7}-\frac{2}{9}-\frac{1}{4}$$=\frac{180-56-63}{252}$ $=\frac{61}{252}$