25X48X125=25X6X(8X125)=300X1000=300000
=25*6*8*125=150*1000=150000求采纳,谢谢
25x48x125 =25x(6X8)x125 =25x6x(8ⅹ125) =150Ⅹ(8x125) =150x1000 =150000