Lm như công thức trên màn hình giúp mk nhé .

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Lm như công thức trên màn hình giúp mk nhé .

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    Đáp án`+`Giải thích các bước giải:

    `a,`

    `BCNN_  (6;3) = 6`

     `a, 1/6+ 1/3`

    `= 1/6+ 2/6`

    `= 3/6`

    `= 1/6`

    `—–`

    `b, ` 

    `BCNN_ ( 4;8)= 8`

    `-1/4 + 1/8`

    `= -2/8 +1/8`

    `= -1/8`

    `c,` 

    `BCNN_ ( 12; 3) = 12`

    `-5/12 + (2/-3)`

    `= -5/12 + (-8/ 12)`

    `= -13/12`

    `d,` 

    $BCNN_{(4;24)}=24$

    `3/4 + (-5/24)`

    `= 18/ 24 + (-5/24)`

    `= 13/24`

    `e, `

    $BCNN_{(5;15)}=15$

    `-3/5 + 1/15`

    `= -9/15 + 1/15`

    `= -8/15`

    `f,` 

    $BCNN_{(6;42)}= 42$

    `-5/6 + 1/42`

    `= -35/42 + 1/42`

    `= -34/42`

    `= -17/21`

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