Question

ayuda porfavor doy corona ​

Answer 1

Respuesta:

a) –41/30

b) 101/140

Explicación paso a paso:

a)

Minuendo:   $[\frac{1}{3}-\frac{2}{5} ]$

Sustraendo: $[\frac{8}{5}-0.3 ]$

Resolviendo:

$[\frac{1}{3}-\frac{2}{5} ] - [\frac{8}{5}-0.3 ]=\frac{5-6}{15}-\frac{16-3}{10}=-\frac{1}{15}-\frac{13}{10}=\frac{-2-39}{30}=-\frac{41}{30}$

b)

Minuendo:   $[1-\frac{3}{7}+\frac{1}{4} ]$

Sustraendo: $[-0.3+\frac{2}{5} ]$

Resolviendo:

$[1-\frac{3}{7}+\frac{1}{4} ]-[-0.3+\frac{2}{5} ]\\\\=[\frac{4}{7}+\frac{1}{4}]-[-\frac{3}{10}+\frac{4}{10}] \\=\frac{16+7}{28}-\frac{1}{10}=\frac{23}{28}-\frac{1}{10}$

$=\frac{115-14}{140} =\frac{101}{140}$