13/37 . 5/12 – 7/37 . 13/6|+ -1/37 . 13/4

By Gianna

13/37 . 5/12 – 7/37 . 13/6|+ -1/37 . 13/4

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  1. Đáp án:

     

    Giải thích các bước giải:

    `13/37.` `5/12` `-` `7/37.` `13/6+` `-1/37.`  `13/4`

    `=` `1/37` `.` `13` `5/12` `-` `1/37` `.91/6` `-` `1/37.`  `13/4`

    `=` `1/37` `.` `65/12` `-` 1/37` `.91/6` `-` `1/37.`  `13/4`

    `=` `1/37` `.(65/12-91/6-13/4)`

    `=` `1/37` `.` `(65/12-182/12-39/12)`

    `=` `1/37` `.` `156/12`

    `=` `1/37` `.` `78/6`

    `=` `78/222`

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    Trả lời
  2. $\dfrac{13}{37} . \dfrac{5}{12} – \dfrac{7}{37} . \dfrac{13}{6} + \dfrac{-1}{37} . \dfrac{13}{4}$

    $= \dfrac{13}{37} . \dfrac{5}{12} – \dfrac{13}{37} . \dfrac{7}{6} + \dfrac{13}{37} . \dfrac{-1}{4}$

    $= \dfrac{13}{37} ( \dfrac{5}{12} – \dfrac{7}{6} + \dfrac{-1}{4} )$

    $= \dfrac{13}{37} . \dfrac{-5}{6}$

    $= \dfrac{-65}{222}$

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