[tex]2\frac78+3\frac16=2\frac{21}{24}+3\frac{4}{24}=5\frac{25}{24}=6\frac1{24}\\\\\frac89-\frac25=\frac{40}{45}-\frac{18}{45}=\frac{22}{45}\\\\\frac78-\frac45=\frac{35}{40}-\frac{32}{40}=\frac3{40}\\\\4\frac56-\frac14=4\frac{10}{12}-\frac{3}{12}=4\frac7{12}\\\\6\frac89-1\frac12=6\frac{16}{18}-1\frac9{18}=5\frac7{18}\\\\8\frac57-3\frac25=8\frac{25}{35}-3\frac{14}{35}=5\frac{11}{35}\\\\4\frac14-4\frac16=4\frac{3}{12}-4\frac{2}{12}=\frac1{12}[/tex]
