负四分之一乘(负五又二分之一)+(负0.25)乘3.5+(负四分之一)×2
-1/4×(-5又1/2)+(-0.25)×3.5+(-1/4)×2
=-1/4×(-5又1/2+3.5+2)
=-1/4×(-5.5+5.5)
=-1/4×0
=0
原式=-0.25*(-5.5+3.5+2)
=-0.25*0
=0
-1/4*(-5.5)+(-1/4)*3.5+(-1/4)*2=(-1/4)*(-5.5+3.5+2)=(-1/4)*0=0
(-1/4)*(-5-1/2)+(-0.25)*3.5+(-1/4)*2
=1/4*11/2-1/4*7/2-1/2
=11/8-7/8-1/2
=1/2-1/2
=0
-1/4×[-(5+1/2)]+(-0.25)×3.5+(-1/4)×2
=1/4×5.5-1/4×3.5-1/4×2
=1/4×(5.5-3.5-2)
=1/4×0
=0
负四分之一乘(负五又二分之一)+(负0.25)乘3.5+(负四分之一)×2
=-1/4*(-11/2)+(-0.25)*3.5+(-1/4)*2
=11/8-7/8-4/8
=0
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