a)
[tex] = 2 \frac{2}{4} = 2 \frac{1}{2} [/tex]
b)
[tex]4 \frac{13}{8} - \frac{7}{8} = 4 \frac{6}{8} = 4 \frac{3}{4} [/tex]
c)
[tex]6 \frac{8}{5} - \frac{4}{5} = 6 \frac{4}{5} [/tex]
d)
[tex]4 \frac{5}{4} - 2 \frac{3}{4} = 2 \frac{2}{4} = 2 \frac{1}{2} [/tex]
e)
[tex]6 \frac{6}{5} - 3 \frac{3}{5} = 3 \frac{3}{5} [/tex]
f)
[tex]8 \frac{9}{8} - 2 \frac{7}{8} = 6 \frac{2}{8} = 6 \frac{1}{4} [/tex]