解：根据分配律的运用，原式=0.25x4x8+0.125x8x4=1x8+1x4=8+4=12
0.25*4*8+0.125*8*4=1*8+1*4=8+4=12
=0.25×4×8+0.125×8×4=8+4=12
=0.25×4×8+0.125×8×4=1×8+1×4=8+4=12
