0.1-0.2+0.3-0.4+0.5-0.6+......+9.9-10+10.1巧算

2024-12-03 13:01:44
推荐回答(1个)
回答1:

(0.1-0.2)+(0.3-0.4)+......+(9.9-10)+10.1
=-0.1*50+10.1
=5.1