Question

me ajudem pfvv
2) 2/7 - 1/5 =
3) 3/4 + 2/7=
são / n o nmr 1​

Answer 1

Resposta:

Explicação passo a passo:

$2)$

$\frac{2}{7}-\frac{1}{5}=$

$mmc(5;7)=35$

$\frac{10}{35} -\frac{7}{35} =$

$\frac{10-7}{35}=$

$\frac{3}{35}$

$3)$

$\frac{3}{4}+\frac{2}{7}=$

$mmc(4;7)=28$

$\frac{21}{28} +\frac{8}{28} =$

 $\frac{21+8}{28} =$

   $\frac{29}{28}$