Вычислите: 5 1/3: 6 2\5+(12: 3 3/5-2/3)умножить 2\3+7 2/5 г) 21 2/59-2/5

katerinkakotoysmyf katerinkakotoysmyf    3   08.06.2019 03:30    0

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99Dia 99Dia  07.07.2020 13:58

5\tt\displaystyle\frac{1}{3}:6\frac{2}{5}+(12:3\frac{3}{5}-\frac{2}{3})*\frac{2}{3}+7\frac{2}{5}=10\frac{1}{90}

1)12:3\tt\displaystyle\frac{3}{5}=12:\frac{18}{5}=\frac{12*5}{80}=\frac{10}{3}

2)\tt\displaystyle\frac{10}{3}-\frac{2}{3}=\frac{8}{3}

3)5\tt\displaystyle\frac{1}{3}:6\frac{2}{5}=\frac{16}{3}:\frac{32}{5}=\frac{16}{3}*\frac{5}{32}=\frac{5}{6}

4)\tt\displaystyle\frac{8}{3}*\frac{2}{3}=\frac{16}{9}

5)\tt\displaystyle\frac{5}{6}+\frac{16}{9}=\frac{15+32}{18}=\frac{47}{18}=2\frac{11}{18}

6)2\tt\displaystyle\frac{11}{18}+7\frac{2}{5}=2\frac{55}{90}+7\frac{36}{90}=9\frac{91}{90}=10\frac{1}{90}

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21\tt\displaystyle\frac{2}{59}-\frac{2}{5}=21\frac{10}{295}-\frac{118}{295}=20\frac{305}{295}-\frac{118}{295}=20\frac{187}{295}

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