a)
[tex] \frac{3}{8} \times 3 \frac{3}{9} - \frac{8 \times 1 + 1}{8} = [/tex]
[tex] = \frac{3}{8} \times \frac{30}{9} - \frac{9}{8 } = [/tex]
[tex] = \frac{3}{8} \times \frac{10}{3} - \frac{9}{8} = [/tex]
[tex] = \frac{30}{24} - \frac{9}{8} = [/tex]
[tex] = \frac{10 - 9}{8} = \frac{1}{8} = 0.125[/tex]