Question

Calcule as frações:

a) 7/2 - 4/5 =
b) 2/3 + 7/3 =
c) 2/3.+ 3/5 + 5/7 =​

Answer 1

$\frac{35 - 8}{10} = \frac{27}{10}$

$\frac{9}{3} = 3$

$\frac{ 10 + 9}{15} = \frac{19}{15} + \frac{5}{7} = \frac{133 + 75}{105} = \frac{208}{105}$