999.6+999.7+999.8+1000.8+1000.7+1000.6简便运算

问题描述:

999.6+999.7+999.8+1000.8+1000.7+1000.6简便运算

999.6+999.7+999.8+1000.8+1000.7+1000.6
=1000*6-0.4-0.3-0.2+0.8+0.7+0.6
=6000+1.2
=6001.2