a)....=$\frac{22}{9}+\frac{7}{6}=\frac{44+21}{18}=\frac{65}{18}=3\tfrac{11}{18}$b)...=$\frac{57}{8}-\frac{23}{4}=\frac{57-46}{8}=\frac{11}{8}=1\tfrac{3}{8}$c)...=$4-\frac{20}{7}=\frac{28-20}{7}=\frac{8}{7}=1\tfrac{1}{7}$
a)....=$\frac{22}{9}+\frac{7}{6}=\frac{44+21}{18}=\frac{65}{18}$b)...=$\frac{57}{8}-\frac{23}{4}=\frac{57-46}{8}=\frac{11}{8}$c)...=$4-\frac{20}{7}=\frac{28-20}{7}=\frac{8}{7}$
a)....=$\frac{22}{9}+\frac{7}{6}=\frac{44+21}{18}=\frac{65}{18}
=3\tfrac{11}{18}$b)...=$\frac{57}{8}-\frac{23}{4}=\frac{57-46}{8}=\frac{11}{8}
=1\tfrac{3}{8}$c)...=$4-\frac{20}{7}=\frac{28-20}{7}=\frac{8
}{7}=1\tfrac{1}{7}$