a.11/3-14/3:16/9-10/3:16/9 b.(-1.5).(1+2/3)+1,4.15/49-(4/5+2/3:11/5

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1. Đáp án:

   a) `-5/6` 

   b) `-7333/2310` 

   Giải thích các bước giải:

   a)

   `11/3-14/3:16/9-10/3:16/9`

   `= 11/3 – 14/3 . 9/16 – 10/3 . 9/16`

   `= – 9/16 . ( 14/3 + 10/3 ) + 11/3`

   `= – 9/16 . 8 + 11/3 = -9/2 + 11/3`

   `= -27/6 + 22/6 = -5/6` 

   b) 

   `(-1.5).(1+2/3)+1,4 . 15/49-(4/5+2/3:11/5)`

   `= (-3/2) . 5/3 + 7/5 . 15/49 – ( 4/5 + 2/3 . 5/11 )`

   `= -5/2 + 3/7 – ( 4/5 + 10/33 )`

   `= -5/2 + 3/7 – 182/165 = -7333/2310` 

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