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\frac{2}{3}+\frac{2}{3}=\frac{4}{3} - True, \frac{3}{4}+\frac{3}{4}=1\frac{1}{2} - True, \frac{1}{3}+\frac{1}{4}=\frac{7}{12} - True, \frac{2}{5}+\frac{7}{15}=\frac{13}{15} - True, \frac{5}{6}-\frac{2}{6}=\frac{1}{3} - True, \frac{5}{10}-\frac{1}{2}=0 - True, 1\frac{2}{3}-\frac{4}{3}=\frac{1}{3} - True, \frac{2}{5}-\frac{1}{8}=\frac{11}{40} - True, \frac{3}{4}\times\frac{2}{3}=\frac{1}{2} - True, \frac{1}{3}\times\frac{1}{3}=\frac{1}{9} - True, \frac{2}{5}\times\frac{3}{7}=\frac{6}{35} - True, \frac{4}{3}\times\frac{4}{3}=1\frac{7}{9} - True, \frac{1}{3}\div\frac{1}{3}=1 - True, \frac{2}{3}\div\frac{3}{5}=\frac{10}{9} - True, \frac{2}{7}\div\frac{3}{7}=\frac{2}{3} - True, \frac{3}{5}\div\frac{2}{7}=\frac{21}{10} - True, \frac{1}{2}+\frac{1}{3}=\frac{2}{5} - False, \frac{4}{5}+\frac{4}{5}=1\frac{2}{5} - False, \frac{1}{4}+\frac{4}{1}=1 - False, 1\frac{1}{2}+2\frac{1}{3}=4\frac{5}{6} - False, \frac{3}{5}-\frac{2}{3}=\frac{1}{2} - False, 2-\frac{1}{8}=\frac{7}{8} - False, \frac{3}{8}-\frac{4}{8}=-\frac{2}{8} - False, 1\frac{3}{4}-\frac{5}{6}=\frac{5}{6} - False, \frac{1}{3}\times\frac{2}{3}=\frac{2}{3} - False, \frac{2}{3}\times\frac{7}{8}=\frac{9}{11} - False, \frac{1}{2}\times 3=2\frac{1}{3} - False, \frac{5}{6}\times\frac{1}{3}=\frac{15}{6} - False, \frac{3}{4}\div\frac{1}{2}=\frac{3}{8} - False, \frac{7}{8}\div\frac{6}{3}=\frac{14}{8} - False, \frac{1}{2}\div\frac{1}{2}=2 - False, 3\div\frac{1}{3}=\frac{1}{10} - False,