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

1998*6.55+445*19.98-0.1998*80000
=1998(6.55+4.45-8)
=1998*3
=(2000-2)*3
=6000-6
=5994 .