Answers

1. `(-7)/9*4/11+(-7)/9*7/11+5 7/9`

   `=(-7)/9(4/11+7/11)+5 7/9`

   `=(-7)/9*1+5 7/9`

   `=(-7)/9+ 5 7/9`

   `=((-7)/9+7/9)+5`

   `=0+5`

   `=5`

    

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2. Đáp án:

    -7/9 . (4+/11+7/11)+52/9

   -7/9.1+52/9

   -7/9+52/9

   45/9=5

   Giải thích các bước giải:

    

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