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yamemes4
ахаэвтвлцжвилалвьвьв

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vikavojakova94

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2) frac{61}{200}-(frac{35}{200}-frac{19}{200})=frac{61}{200}-frac{16}{200}=frac{45}{200}=frac{9}{40}

3) frac{21}{65} -frac{16}{65} +frac{13}{65} =frac{5}{65} +frac{13}{65} =frac{18}{65}

4) frac{21}{30} -(frac{1}{30} +frac{9}{30}) = frac{21}{30} -frac{10}{30} = frac{11}{30}

5) frac{17}{19} -(frac{5}{19} +frac{2}{19} ) = frac{17}{19}-frac{7}{19} = frac{10}{19}

6) frac{3}{10} + frac{5}{10} -frac{7}{10} = frac{8}{10} -frac{7}{10} =frac{1}{10} =0.1

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