Question

mim ajudar por favor​

Answer 1

Explicação passo a passo:

a) $-\dfrac{5}{8} - \dfrac{3}{6}$

MMC(8, 6):

$8,\ 6\ |\ 2\\4,\ 3\ |\ 2\\2,\ 3\ |\ 2\\1,\ 3\ |\ 3\\1,\ 1\ |\ \Longrightarrow 2^3\cdot 3 = 24$

$-\dfrac{5}{8} -\dfrac{3}{6} = \dfrac{- (3\cdot 5) - (4\cdot3)}{24} = \dfrac{-15-12}{25} = \dfrac{-27}{24}$

b)$-\dfrac{8}{3} - \dfrac{6}{5}$

MMC(3, 5):

$3,\ 5\ |\ 3\\1,\ 5\ |\ 5\\1,\ 1\ |\ \Longrightarrow 3\cdot 5 = 15$

$-\dfrac{8}{3} - \dfrac{6}{5} = \dfrac{-(5\cdot8)-(3\cdot6)}{15} = \dfrac{-40-18}{15} = -\dfrac{58}{15}$