h) -7/11.11/19+ -7/11.8/19+ -4/11 i) (-4/5+4/3) + (-5/4+14/5) -7/3

0 bình luận về “h) -7/11.11/19+ -7/11.8/19+ -4/11 i) (-4/5+4/3) + (-5/4+14/5) -7/3”

1. h) `-7/11` .`11/19` + `-7/11` . `8/19` + `-4/11`

   = `-7/11` . ( `11/19` +`8/19` )

   = `-7/11` . `19/19`

   = `-7/11` . 1

   = `-7/11` 

   i) ( `-4/5` + `4/3` ) + ( `-5/4` + `14/5` ) – `7/3` 

   = `-4/5` + `4/3` + `-5/4` + `14/5` + `-7/3`

   = ( `-4/5` + `14/5` ) + ( `4/3` + `-7/3` ) + `-5/4`

   = 2 + 1 + `-5/4`

   = 3 + `-5/4`

   = `12/4` + `-5/4` 

   = `7/4`

    

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2. `(-7/11).11/19+ (-7/11).8/19+ (-4/11)`

   `= (-7/11).(11/19+8/19) + (-4/11)`

   `= (-7/11).1 + (-4/11)`

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

   `= -1`

   `(-4/5+4/3) + (-5/4+14/5) -7/3`

   `= (-4/5)+4/3 + (-5/4)+14/5 – 7/3`

   `= (-4/5 + 14/5) + (4/3-7/3 ) + (-5/4)`

   `= (-2) + (-1) + (-1,25)`

   `= (-3) + (-1,25)`

   `= -4,25`

   (Chúc bạn học tốt)

    

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