1.27*0.75-35*0.75-0.75怎样简算?

1.27*0.75-35*0.75-0.75
=0.75*(1.27-35-1)
=-26.0475

(1.27-35-1)*0.75

原式=0.75*（1.27-35-1）
=0.75*（0.27-35）
=（0.5+0.25）*（0.27-35）
=0.5*0.27+0.25*0.27-0.5*35-0.25*35
=0.135+0.0675+17.5+8.75
=26.4525
不晓得算不算对额……自己写的、、、