a)
[tex]3 \frac{7}{8} + 2 \frac{2}{3} = 3 \frac{21}{24} + 2 \frac{16}{24} = 5 \frac{37}{24} = 6 \frac{13}{24} [/tex]
b)
[tex]4 \frac{2}{3} - 2 \frac{3}{5} = 4 \frac{10}{15} - 2 \frac{9}{15} = 2 \frac{1}{15} [/tex]
c)
[tex]8 \frac{2}{5} - 6 \frac{1}{6} = 8 \frac{12}{30} - 6 \frac{5}{30} = 2 \frac{7}{30} [/tex]
d)
[tex]9 \frac{4}{5} - 7 \frac{2}{7} = 9 \frac{28}{35} - 7 \frac{10}{35} = 2 \frac{18}{35} [/tex]
e)
[tex]4 \frac{2}{5} + 6 \frac{6}{7} = 4 \frac{14}{35} + 6 \frac{30}{35} = 10 \frac{44}{35} = 11 \frac{9}{35} [/tex]
