Tính hợp lí -1/8 + (-5/3) : 15/24

-1/8 + (-5/3) : 15/24

= -1/8 - 5/3 : 15/24

= (-3-40)/24 : 15/24

= -43/24 : 15/24

= -43/24 × 24/15

= -43/15

-1/8 + (-5/3) : 15/24

= -1/8 - 5/3 : 15/24

= -43/24 : 15/24

= -43/15

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