1998*6.55+445*19.98-0.1998*80000简便算法
问题描述:
1998*6.55+445*19.98-0.1998*80000简便算法
答
1998*6.55+445*19.98-0.1998*80000
=1998(6.55+4.45-8)
=1998*3
=(2000-2)*3
=6000-6
=5994 .