0.1999+1.999+19.99+199.9如何用简便算法算出来

问题描述:

0.1999+1.999+19.99+199.9如何用简便算法算出来

0.1999+1.999+19.99+199.9
=0.2+2+20+200-0.1-0.01-0.001.0.0001
=222.2-0.1111
=222.0889