Question

Resolva as operações:

a) 2/3 + 4/5 =
b) 3/7 + 1/5 - 1/2 =

Answer 1

a- (-2 + -3)/2 = -5/2 = -2,5 ; (4 + 2)/2 = 6/2 = 3 → Ma(-2,5, 3) 

b- (3/6 + -1)/2 = (0,5 - 1)/2 = -0,5/2 = -0,25 ; (4/8 + 5) = (0,5 + 5)/2 = 5,5/2 = 2,75 → Mb(-0,25, 2,75) 

Answer 2

$\frac{2}{3} + \frac{4}{5} = \frac{10}{15} + \frac{12}{15} = \frac{22}{15}$
$\frac{3}{7} + \frac{1}{5} - \frac{1}{2} = \frac{30}{70} + \frac{14}{70} - \frac{35}{70} = \frac{9}{70}$