1.1/2.2+2.2/4.4+3.3/6.6+4.4/8.8+5.5/11+6.6/13.2 简算

问题描述:

1.1/2.2+2.2/4.4+3.3/6.6+4.4/8.8+5.5/11+6.6/13.2 简算

都是1/2 6个 所以是3