如题所述
第1个回答 2016-02-24
(1999.5+0.5)+(199.9+0.1)+(19.9+0.1)+(1.9+0.1)-0.4
=2000+200+20+2-0.4
=2222-0.4
=2221.6
=2000+200+20+2-0.4
=2222-0.4
=2221.6
第2个回答 2016-02-24
1.9+19.9+199.9+1999.5+0.4
=2+20+200+2000-0.1-0.1-0.1-0.5+0.4
=2222-0.4
=2221.5本回答被网友采纳
=2+20+200+2000-0.1-0.1-0.1-0.5+0.4
=2222-0.4
=2221.5本回答被网友采纳
第3个回答 2016-02-24
2-0.1+20-0.1+200-0.1+2000-0.1=2222-0.4=2221.6
第4个回答 2016-02-24
=2-0.1+20-0.1+200-0.1+2000-0.1+0.4
=2222-0.4+0.4
=2222
=2222-0.4+0.4
=2222
第5个回答 2016-02-24
2+20+200+2000-0.4=2221.6