Question

1).Calcule,observe o modelo e faça


Pfvr me ajudem e pra hoje

Answer 1

Resposta:

Explicação passo-a-passo:

a)

$(\frac{2}{8})+(-\frac{3}{4})=\frac{2-2.3}{8}=\frac{2-6}{8}=-\frac{-4}{8}=-\frac{1}{2}$

b)

$(-\frac{3}{5})+(-\frac{2}{7})=\frac{-7.3+5.(-2)}{35}=\frac{-21-10}{35}=-\frac{31}{35}$

c)

$(+\frac{6}{7})+(+\frac{10}{14})=(+\frac{6}{7})+(+\frac{5}{7})=+\frac{11}{7}$

d)

$(\frac{8}{7})+(\frac{2}{5})=\frac{5.8+7.2}{35}=\frac{40+14}{35}=\frac{54}{35}$