以下是分数混合运算的100道练习题，涵盖四则运算及简便计算，适合不同年级学生练习：
一、基础运算类（40道）
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$\frac{1}{2} + \frac{3}{4}$
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$\frac{2}{3} \times \frac{5}{6} \div \frac{1}{2}$
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$\frac{1}{4} + \frac{1}{3} \times \frac{2}{5}$
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$\frac{3}{8} \div \frac{1}{4} - \frac{1}{2}$
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$\frac{5}{6} \times \left（ \frac{2}{3} - \frac{1}{4} \right）$
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$\frac{7}{8} \div \left（ \frac{1}{2} + \frac{1}{4} \right）$
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$\frac{2}{3} + \frac{1}{6} \times \frac{3}{4}$
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$\frac{4}{5} \div \frac{3}{10} - \frac{1}{5}$
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$\frac{9}{10} \times \left（ \frac{1}{2} - \frac{2}{5} \right）$
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$\frac{11}{12} \div \left（ \frac{3}{4} + \frac{1}{6} \right）$
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$\frac{3}{5} \times \frac{4}{7} + \frac{2}{5} \times \frac{4}{7}$
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$\frac{8}{9} \div \frac{4}{3} - \frac{1}{3}$
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$\frac{5}{12} + \frac{3}{8} \times \frac{2}{3}$
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$\frac{7}{10} \div \frac{5}{6} - \frac{2}{5}$
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$\frac{2}{7} \times \frac{3}{8} + \frac{5}{7} \times \frac{3}{8}$
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$\frac{9}{11} \div \frac{3}{2} - \frac{1}{11}$
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$\frac{4}{15} + \frac{2}{9} \times \frac{3}{4}$
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$\frac{6}{13} \div \frac{2}{3} - \frac{1}{13}$
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$\frac{3}{8} \times \frac{5}{9} + \frac{1}{8} \times \frac{5}{9}$
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$\frac{7}{15} \div \frac{7}{6} - \frac{1}{5}$
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$\frac{5}{18} + \frac{4}{9} \times \frac{2}{3}$
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$\frac{10}{17} \div \frac{5}{8} - \frac{2}{17}$
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$\frac{2}{11} \times \frac{3}{7} + \frac{9}{11} \times \frac{3}{7}$
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$\frac{8}{13} \div \frac{4}{5} - \frac{1}{13}$
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$\frac{3}{10} \times \frac{7}{9} + \frac{7}{10} \times \frac{7}{9}$
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$\frac{11}{14} \div \frac{7}{8} - \frac{1}{14}$
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$\frac{4}{17} + \frac{5}{17} \times \frac{2}{5}$
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$\frac{6}{19} \div \frac{3}{4} - \frac{1}{19}$
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$\frac{5}{20} \times \frac{3}{7} + \frac{15}{20} \times \frac{3}{7}$
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$\frac{9}{22} \div \frac{9}{10} - \frac{1}{22}$
二、简便计算类（30道）
- $\frac{3}{4} \times \frac{5}{6} + \frac{1}{4} \times \frac{5}{6} = \left（ \