简便脱式计算：63-0.63*8.28-6.3*0.172
问题描述：
简便脱式计算：63-0.63*8.28-6.3*0.172
答
63-6.3(0.828+0.172)=56.7
答
63-0.63*8.28-6.3*0.172
=6.3*10-6.3*0.828-6.3*0.172
=6.3*(10-0.828-0.172)
=6.3*9
=56.7