[tex]11 \div (4 - \frac{1}{3} ) = 11 \div ( \frac{12}{3} - \frac{1}{3} ) = 11 \div \frac{11}{3} = 11 \times \frac{3}{11} = 3[/tex]
[tex](5 + \frac{1}{5} ) \div \frac{13}{15} = ( \frac{25}{5} + \frac{1}{5} ) \div \frac{13}{15} = \frac{26}{5} \times \frac{15}{13} = 3[/tex]
[tex](2 - \frac{1}{4} ) \div (1 - \frac{1}{2} ) = ( \frac{8}{4} - \frac{1}{4} ) \div ( \frac{2}{2} - \frac{1}{2}) = \frac{7}{4} \div \frac{1}{2} = \frac{7}{4} \times \frac{2}{1} = 3.5[/tex]
