Suma de fracciones: Uno de los denominadores es el denominador común

$\frac{1}{2}+\frac{3}{8}=$

$\frac{7}{8}$

$\frac{2}{4}+\frac{1}{2}=$

$1$

$\frac{2}{3}+\frac{1}{6}=$

$\frac{5}{6}$

$\frac{2}{4}+\frac{1}{8}=$

$\frac{5}{8}$

$\frac{1}{5}+\frac{6}{10}=$

$\frac{8}{10}$

$\frac{1}{3}+\frac{3}{6}=$

$\frac{5}{6}$

$\frac{1}{4}+\frac{6}{12}=$

$\frac{9}{12}$

$\frac{1}{3}+\frac{2}{9}=$

$\frac{5}{9}$

$\frac{1}{3}+\frac{4}{9}=$

$\frac{7}{9}$

$\frac{1}{2}+\frac{2}{4}=$

$1$

$\frac{3}{5}+\frac{6}{10}=$

$\frac{6}{5}$

$\frac{1}{2}+\frac{3}{8}=$

$\frac{7}{8}$

$\frac{5}{12}+\frac{11}{36}=$

$\frac{13}{18}$

$\frac{2}{9}+\frac{3}{18}=$

$\frac{7}{18}$

$\frac{1}{18}+\frac{1}{6}=$

$\frac{2}{9}$

$\frac{2}{3}+\frac{1}{9}=$

$\frac{7}{9}$

$\frac{3}{4}+\frac{2}{20}=$

$\frac{17}{20}$

$\frac{3}{8}+\frac{1}{4}=$

$\frac{5}{8}$

$\frac{1}{15}+\frac{2}{5}=$

$\frac{7}{15}$

$\frac{4}{15}+\frac{2}{5}=$

$\frac{2}{3}$