Question

Alguem me ajuda?? pfv :p (todas essas perguntas pfv)​

Answer 1

Resposta:

Explicação passo a passo:

7-

$mmc\\\\11,5/11\\1,5/5\\1,1\\\frac{4}{11} +\frac{2}{5} = \frac{20+22}{55}=\frac{42}{55}$

8-

$mmc\\\\9,7/3\\3,7/3\\1,7/7\\1,1\\\frac{1}{9} +\frac{2}{7} =\frac{7+14}{63} =\frac{21}{63} =\frac{1}{3}$

9-

$mmc\\4,15/2\\2,15/2\\1,15/15\\1,1\\\\frac{1}{4} +\frac{1}{15} =\frac{15+4}{60} =\frac{19}{60}$