48x5x125简算

25x64x625的简算方法急急急 -
25x64x625 =25x4x2x8x5x125 =25x4x（2x5）x（8x125）100x10x1000 =1000000
25x256x125简算=25x4x64x25x5 =100×8×8x5x25 =100x(25×8)×40 =100×200×40 =20000×40 =800000