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1) 17/20 - 9/20 = a) \frac{8}{20}=\frac{2}{5} b) \frac{26}{20}=\frac{13}{10} 2) 49/50 - 33/50 = a) \frac{26}{100}=\frac{13}{50} b) \frac{16}{50}=\frac{8}{25} 3) 7 4/5 - 5 3/5 =  a) 1\frac{4}{5} b) 2\frac{1}{5} 4) 2 8/15 - 1 8/15 = a) \frac{7}{15} b) 1 5) 9 7/30 - 6 = a) 3\frac{7}{30} b) 3\frac{7}{6} 6) 6 - 1 3/7 = a) 4\frac{4}{7} b) 5\frac{4}{7} 7) 8 3/20 - 1 17/20 = a) 7\frac{6}{20}=7\frac{3}{10} b) 6\frac{6}{20}=6\frac{3}{10}

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