a)
[tex]8 \frac{4}{11} - 5 \frac{9}{11} = 7 \frac{15}{11} - 5 \frac{9}{11} = 2 \frac{6}{11} [/tex]
b)
[tex]8 \frac{5}{6} + 5 \frac{3}{8} = 8 \frac{20}{24} + 5 \frac{9}{24} = 13 \frac{29}{24} = 14 \frac{5}{24} [/tex]
c)
[tex]7 \frac{2}{3} - 4 \frac{2}{5} = 7 \frac{10}{15} - 4 \frac{6}{15} = 3 \frac{4}{15} [/tex]
d)
[tex]1 \frac{2}{7} \times 4 \frac{1}{12} = \frac{9}{7} \times \frac{49}{12} = \frac{3}{1} \times \frac{7}{4} = \frac{21}{4} = 5 \frac{1}{4} [/tex]
e)
[tex]4 \frac{8}{15} \div 3 \frac{2}{5} = \frac{68}{15} \div \frac{17}{5} = \frac{68}{15} \times \frac{5}{17} = \frac{4}{3} \times \frac{1}{1} = \frac{4}{3} = 1 \frac{1}{3} [/tex]
