这道题怎么算
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这道题怎么算
=-99×71/2=-7029/2=-3514.5
(-1/2+1/6-3/8+5/12)×(-24)
=(-1/2)×(-24)+1/6×(-24)-3/8×(-24)+5/12×(-24)
=12-4+9-10
=7
99又71/72×(-36)
=(100-1/72)×(-36)
=100×(-36)-1/72×(-36)
=-3600+1/2
=-3599又1/2
=(100-1/72)×(-36)
=100×(-36)-1/72×(-36)
=-3600+1/2
=-3599 1/2