简便计算方法如下:372×10.2-37.2-37.2=37.2×102-37.2×2=37.2×(102-2)=37.2×100=3720
把10.2改为 10+0.2然后用乘法分配律计算372x(10+0.2)=372x10+372x0.2=3720+37.2=3757.2
372×(10+0.2)=372×10+372×0.2=3720+74.4=3794.4
372*(10+0.2)=3720+74.4=3794.4