Question

operaciones combinadas con números racionales 3/4-[2/5+{(2/5+3/5)-(1/6+1/2}] ​

Answer 1

$\mathrm{Seguir\:el\:orden\:PEMDAS\:de\:las\:operaciones}$

$\bold{=2/5+\left(2/5+3/5\right)-\left(1/6+1/2\right)}$

$\bold{=2/5+1-\left(1/6+1/2\right)}$

$\bold{2/5+1-\frac{2}{3}}$

$\bold{=\frac{2}{5}+1-\frac{2}{3}}$

$\bold{=\frac{11}{15}}$

$\bold{=\frac{3}{4}-\frac{11}{15}}$

$\bold{=\frac{45-44}{60}}$

$\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{\boxed{ \bold{=\frac{1}{60}}}}}}}}}}}}}}}}}}}}}}}}}}}$