如题所述
第1个回答 2016-08-31
1.9+19.9+199.9+1999.9+19999.9+0.5
=1.9+19.9+199.9+1999.9+19999.9+0.1+0.1+0.1+0.1+0.1
=(1.9+0.1)+(19.9+0.1)+(199.9+0.1)+(1999.9+0.1)+(19999.9+0.1)
=2+20+200+2000+20000
=22222本回答被网友采纳
=1.9+19.9+199.9+1999.9+19999.9+0.1+0.1+0.1+0.1+0.1
=(1.9+0.1)+(19.9+0.1)+(199.9+0.1)+(1999.9+0.1)+(19999.9+0.1)
=2+20+200+2000+20000
=22222本回答被网友采纳
第2个回答 2016-08-31
把0.5分成五个0.1分别分配到五个0.9里,凑整算