Question

efetue as subtraçoes
a)(+5/7) - (+2/3)=
b)(+2/3) - (+1/2)=
c)(+2/3) - (+4/5) =
d)(-7/8)-(-3/4)=
e)(-2/5)-(-1/4)=

Answer 1

Resposta:

$\textsf{Leia abaixo}$

Explicação passo-a-passo:

$\sf \dfrac{5}{7} - \dfrac{2}{3} = \dfrac{15 - 14}{21} = \dfrac{1}{21}$

$\sf \dfrac{2}{3} - \dfrac{1}{2} = \dfrac{4 - 3}{6} = \dfrac{1}{6}$

$\sf \dfrac{2}{3} - \dfrac{4}{5} = \dfrac{10 - 12}{15} = -\dfrac{2}{14}$

$\sf -\dfrac{7}{8} + \dfrac{3}{4} = \dfrac{-28 + 24}{32} = -\dfrac{4}{32} = -\dfrac{1}{8}$

$\sf -\dfrac{2}{5} + \dfrac{1}{4} = \dfrac{-8 + 5}{20} = -\dfrac{3}{20}$