（-0.25）的2005次方乘（-4）的2004次方的值为?

(-0.25)^2005×(-4)^2004
= (-0.25)×(-0.25)^2004×(-4)^2004
= (-0.25)×[(-0.25)^2004×(-4)^2004]
= (-0.25)×[(-0.25)×(-4)]^2004
= (-0.25)×1^2004
= -0.25×1
= -0.25