Đáp án:

`1) 3 1/5 * (-25)/32`

`= 16/5 *(-25)/32`

`= (-5)/2`

`2) 5/4 * (-3 1/5)`

`= 5/4 * (-16)/5`

`= -4`

`3) 10/13 * (4 6/5)`

`= 10/13 * 26/5`

`= 4`

`4) -1 5/9 * 12/(-7)`

`= (-14)/9 * (-12)/7`

`= 8/3`

`---------`

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