12.5×9.6×0.25的简便算法运用乘法结合律使计算简便：12.5×9.6×0.25=12.5×8×0.3×4×0.25=（12.5×8）×0.3×（4×0.25）=100×0.3×1=30
12.5×9.6×0.25=（12.5×8）×（0.25×4）×0.3=100×1×0.3=30
