Question

ajd ae pfvvvvvvvvvvv​

Answer 1

Respostas:

a)    $\frac{27}{20}$

b) $-\frac{1}{3}$

c) $-\frac{21}{40}$

d) $-\frac{3}{7}$

Explicação:

a)

$\frac{3}{5}-\frac{-3}{4}=\\\\\frac{12}{20}+\frac{15}{20}\\\\\frac{27}{20}$

b)

$0,5+\frac{-5}{6}=\\\\\frac{1}{2}+\frac{-5}{6}=\\\\\frac{3}{6}+\frac{-5}{6}=\\\\-\frac{2}{6}=\\\\-\frac{1}{3}$

c)

$\frac{-3}{4}*\frac{7}{10}=\\\\\frac{-21}{40}$

d)

$\frac{3}{4} \div (-\frac{7}{5})\\\\\frac{3}{4} * (-\frac{5}{7})\\\\-\frac{15}{21}=\\\\-\frac{3}{7}$