Question

9/7 + 18/7 =
8/5-6/5=
5/9+8/3=
3/5-7/3=

(con procedimiento, es para mañana ｡⁠:ﾟ⁠(⁠;⁠´⁠∩⁠`⁠;⁠)ﾟ⁠:⁠｡)​

Answer 1

Explicación paso a paso:

$\frac{9}{7} + \frac{18}{7} = \frac{9 + 18}{7} = \frac{27}{7}$

$\frac{8}{5} - \frac{6}{5} = \frac{8 - 6}{5} = \frac{2}{5}$

$\frac{5}{9} + \frac{8}{3} \\ = \frac{(5 \times 3) + (9 \times 8)}{9 \times 3} \\ = \frac{15 + 72}{27} \\ = \frac{87}{27} \\ = \frac{29}{9}$

$\frac{3}{5} - \frac{7}{3} \\ = \frac{(3 \times 3) ( 5 \times - 7)}{5 \times 3} \\ = \frac{9 - 35}{15} \\ = \frac{ - 26}{15}$