a] [tex]2\frac{1}{4}+1\frac{1}{4}=2\frac{2}{4}=2\frac{1}{2} [/tex]
b] [tex]4\frac{1}{9}+2\frac{3}{9}=6\frac{4}{9} [/tex]
c] [tex]3\frac{5}{20}+6=9\frac{1}{4} [/tex]
d] [tex]5+4\frac{2}{3} =9\frac{2}{3} [/tex]
e] [tex]2\frac{1}{5}+\frac{2}{5} =2\frac{3}{5} [/tex]
f] [tex]7\frac{5}{7}+1\frac{1}{7} =8\frac{6}{7} [/tex]
