Question

5) Resolve as operades com frações a seguir
a) 2/3 - 5/3 =
b) 7/4-3/4 =
c) 8/5.6/3 =
d) 7/5 : 5/8 =
e) 5/4 +6/5 =
f) 8/3 - 5/4 =
​

Answer 1

Resposta:

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

$\frac{7}{4} -\frac{3}{4} =\frac{7-3}{4} =\frac{4}{4} =1$

$\frac{8}{5} .\frac{6}{3} =\frac{48}{15}$ (simplifica por 3) $=\frac{16}{5}$

$\frac{7}{5}$  ÷ $\frac{5}{8} = \frac{7}{5} .\frac{8}{5} =\frac{56}{25}$

$\frac{5}{4} +\frac{6}{5} =\frac{25+24}{20} =\frac{49}{20}$

$\frac{8}{3} -\frac{5}{4} =\frac{32-15}{12} =\frac{17}{12}$