8+(副四分之三)-5-(-0.25)
=8+(-3/4)-5-(-1/4)
=8-3/4-5+1/4
=8-5+1/4-3/4
=3-1/2
=5/2
(负六分之一+四分之三-十二分之一)×(-24)
=(-1/6+3/4-1/12)×(-24)
=-(1/6-3/4+1/12)×(-24)
=(1/6-3/4+1/12)×24
=24×1/6-24×3/4+24×1/12
=4-18+2
=6-18
=-12
8+(副四分之三)-5-(-0.25)
=8+(-3/4)-5-(-1/4)
=8-3/4-5+1/4
=8-5+1/4-3/4
=3-1/2
=5/2
(负六分之一+四分之三-十二分之一)×(-24)
=(-1/6+3/4-1/12)×(-24)
=-(1/6-3/4+1/12)×(-24)
=(1/6-3/4+1/12)×24
=24×1/6-24×3/4+24×1/12
=4-18+2
=6-18
=-12