1)\(\frac{3}{7}+\frac{2}{7}\)
\(\frac{5}{7}\)
2)\(\frac{4}{7}+\frac{5}{7}\)
\(\frac{9}{7}\)
3)\(\frac{5}{6}+\frac{1}{3}\)
\(\frac{7}{6}\)
4)\(\frac{1}{4}+\frac{3}{8}\)
\(\frac{5}{8}\)
5)\(\frac{2}{3}+\frac{1}{9}\)
\(\frac{7}{9}\)
6)\(\frac{5}{6}+\frac{1}{2}+\frac{2}{6}\)
\(\frac{10}{6}\)
7)\(\frac{1}{8}+\frac{1}{4}+\frac{1}{2}\)
\(\frac{7}{8}\)
8)\(\frac{3}{7}+\frac{5}{28}+ \frac{9}{14}\)
\(\frac{35}{28}\)