Question

quanto é a fração de 15/25-3/5- 8/5+4/9

Answer 1

15/25 - 3/5 - 8/5 + 4/9 ---- 3/5 - 3/5 - 8/5 + 4/9 ------- - 8/5 + 4/9 ----- MMC---(45)

(- 72+ 20)/45 -------  - 52/45

Answer 2

$\frac{15}{25} - \frac{3}{5} - \frac{8}{5} + \frac{4}{9}$
$= \frac{3}{5} - \frac{3}{5} - \frac{8}{5} + \frac{4}{9}$
$=- \frac{8}{5} + \frac{4}{9}$
$=- \frac{8*9}{5*9} + \frac{4*5}{9*5}$
$=- \frac{72}{45} + \frac{20}{45}$
$= \frac{-72+20}{45}$
$=- \frac{52}{45}$