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
63-0.63*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