\(\frac34+\frac42=\frac34+\frac84=\frac{3+8}{4}=\frac{11}{4}\)
\(\frac37+\frac56=\frac{18}{42}+\frac{35}{42}=\frac{18+35}{42}=\frac{53}{42}\)
\(\frac98+\frac34=\frac98+\frac68=\frac{9+6}{8}=\frac{15}{8}\)
\(\frac57+\frac28=\frac57+\frac14=\frac{20}{28}+\frac{7}{28}=\frac{20+7}{28}=\frac{27}{28}\)
\(\frac37+4=\frac37+\frac{28}{7}=\frac{3+28}{7}=\frac{31}{7}\)
\(6+\frac43=\frac{18}{3}+\frac43=\frac{22}{3}\)
\(\frac38+2=\frac38+\frac{16}{8}=\frac{19}{8}\)
\(\frac93+3=3+3=6\)
\(3-\frac{11}{7}=\frac{21}{7}-\frac{11}{7}=\frac{10}{7}\)
\(\frac{13}{18}-\frac36=\frac{13}{18}-\frac{9}{18}=\frac{13-9}{18}=\frac{4}{18}=\frac29\)
\(\frac92-3=\frac92-\frac62=\frac{9-6}{2}=\frac32\)
\(\frac56-\frac48=\frac56-\frac36=\frac{5-3}{6}=\frac26=\frac13\)
\(\frac23\times\frac37=\frac{2\times3}{3\times7}=\frac27\)
\(\) \(\frac49\times\frac75=\frac{4\times7}{9\times5}=\frac{28}{45}\)
\(\frac39\times\frac{18}{72}=\frac13\times\frac14=\frac{1}{12}\)
\(\frac59\times\frac78=\frac{5\times7}{9\times8}=\frac{35}{72}\)
\(\frac56:\frac23=\frac56\times\frac32=\frac{15}{12}=\frac54\)
\(\frac42:\frac86=2:\frac86=2:\frac43=2\times\frac34=\frac32\)
\(\frac34\times\frac94=\frac{3\times9}{4\times4}=\frac{27}{16}\)
\(\frac85\times\frac17=\frac{8}{5\times7}=\frac{8}{35}\)
