原式=(-4)×0.25×(-5) =-1×(-5) =5乘法交换律：a×b=b×a，本题中为a×b×c=a×c×b希望对你有帮助，望采纳。
(-4)×(-5)×0.25=(-4)×0.25x(-5)=(-1)x(-5)=5
=4×5×0.25=4×0.25×5=1×5=5
-4×0.25×(-5)=-1×(-5)=5求采纳
