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Najlepsze rozwiązanie

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  rzbyszek 21.9.2011 (05:47)

  4 \frac{2}{7}+1 \frac{2}{3}=4 \frac{6}{21}+1 \frac{14}{21}=5 \frac{20}{21}
  
  5 \frac{1}{2}+3 \frac{5}{9}=5 \frac{9}{18}+3 \frac{10}{18}=8 \frac{28}{18}=9 \frac{10}{18}=9 \frac{5}{9}
  
  1- \frac{3}{7}= \frac{7}{7}- \frac{3}{7}= \frac{4}{7}
  
  1- \frac{7}{11}= \frac{11}{11}- \frac{7}{11}= \frac{4}{11}
  
  1- \frac{9}{16}= \frac{16}{16}- \frac{9}{16}= \frac{7}{16}
  
  3-1 \frac{4}{9}=2 \frac{9}{9}-1 \frac{4}{9}=1 \frac{5}{9}
  
  6-2 \frac{3}{5}=5 \frac{5}{5}-2 \frac{3}{5}=3 \frac{2}{5}
  
  7 -1\frac{3}{7}= 6\frac{7}{7}-1 \frac{3}{7}=5 \frac{4}{7}
  
  8 \frac{1}{2}-2 \frac{5}{8}=8 \frac{4}{8}-2 \frac{5}{8}=5 \frac{7}{8}
  
  7 \frac{1}{16}-5 \frac{5}{8}=6 \frac{17}{16}-5 \frac{10}{16}=1 \frac{7}{16}
  
  4 \frac{2}{3}-1 \frac{4}{9}=4 \frac{6}{9}-1 \frac{4}{9}=3 \frac{2}{9}
  
  5 \frac{3}{4}-3 \frac{5}{6}=5 \frac{9}{12}-3 \frac{10}{12}=1 \frac{11}{12}
  
  9 \frac{5}{8}-2 \frac{11}{12}=9 \frac{15}{24}-2 \frac{22}{24}=6 \frac{17}{24}
  
  4 \frac{7}{15}-1 \frac{2}{3}=4 \frac{14}{30}-1 \frac{20}{30}=2 \frac{24}{30}=2 \frac{4}{5}
  
  6 \frac{7}{18}-2 \frac{5}{6}=6 \frac{7}{18}-2 \frac{15}{18}=3 \frac{10}{18}=3 \frac{5}{9}
  
  
  2 \frac{2}{3} \cdot 1 \frac{3}{8}= \frac{8}{3} \cdot \frac{11}{8}= \frac{11}{3}=3 \frac{2}{3}
  
  3 \frac{1}{3} \cdot 2 \frac{7}{10}= \frac{10}{3} \cdot \frac{27}{10}= \frac{27}{3}=9
  
  1 \frac{2}{5} \cdot 2 \frac{2}{7} \cdot 1 \frac{1}{9}= \frac{7}{5} \cdot \frac{16}{7} \cdot \frac{10}{9}= \frac{32}{9}=3 \frac{5}{9}
  
  2 \frac{4}{5} \cdot 10 = \frac{14}{5} \cdot 10=28
  
  6 \cdot 1 \frac{7}{8}=6 \cdot \frac{15}{8}= \frac{45}{4}=11 \frac{1}{4}
  
  3 \frac{2}{3} \cdot 9 \cdot 1 \frac{1}{11}= \frac{11}{3} \cdot 9 \cdot \frac{12}{11}=36
  
  2 \frac{2}{5}:1 \frac{1}{5}= \frac{12}{5}: \frac{6}{5}= \frac{12}{5} \cdot \frac{5}{6}=2
  
  4 \frac{2}{3}:1 \frac{2}{5}= \frac{14}{3}: \frac{7}{5}= \frac{14}{5} \cdot \frac{5}{7}=2
  
  3 \frac{3}{4}:6= \frac{15}{4} \cdot \frac{1}{6}= \frac{15}{24}= \frac{5}{8}
  
  2:1 \frac{5}{7}= 2 \cdot \frac{7}{5} \frac{14}{5}=2 \frac{4}{5}
  
  1 \frac{3}{7}:2 \frac{3}{4}= \frac{10}{7}: \frac{11}{4}= \frac{10}{7} \cdot \frac{4}{11}= \frac{40}{77}

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    rzbyszek 21.9.2011 (06:07)

    w 2 przykładzie jest błąd, na priv masz poprawkę