Question

qual o valor de a - b, se a = $\frac{2}{3}$ e b = - $\frac{3}{5}$?

Answer 1

$a - b = \\ = \frac{2}{3} - (- \frac{3}{5} ) = \\ = \frac{2*5}{3*5} - (- \frac{3*3}{5*3}) =\\ \frac{10}{15} + \frac{9}{15} = \frac{19}{15}$