(-1/4+1/6-1/8+1/12)*(-24)要求简便

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(-1/4+1/6-1/8+1/12)*(-24)要求简便

(-1/4+1/6-1/8+1/12)*(-24)要求简便
(-1/4+1/6-1/8+1/12)*(-24)
要求简便

(-1/4+1/6-1/8+1/12)*(-24)要求简便
(-1/4+1/6-1/8+1/12)*(-24)
=1/4x24-1/6x24+1/8x24-1/12x24
=6-4+3-2
=3

(-1/4+1/6-1/8+1/12)*(-24)
=-1/4 *(-24)+1/6 *(-24)-1/8 *(-24)+1/12)*(-24)
=6-4+3-2
=3