0.75*102-1.5简便计算
问题描述:
0.75*102-1.5简便计算
答
0.75*102-0.75*2
=0.75*(102-2)
=75
答
0.75*102-1.5
=0.75x(100+2)-1.5
=75+1.5-1.5
=75