=44.4*9.4+22.2*1.2=22.2*（2*9.4+1.2）乖乘法分配律简便算法=22.2*20=444
44.4×9.4+22.2×1.2=22.2×2×9.4+22.2×1.2＝22.2×18.8+22.2×1.2＝22.2×（18.8+1.2）＝22.2×30＝666
