1000.9+100.09+10.009+1.0009+999.1+99.91+9.991+0.9991
=1.0009(1000+100+10+1﹚+0.9991(1+10+100+1000)
=1111*(1.0009+0.9991)
=2222
题目中是否缺失了10.009?
1000.9+100.09+10.009+1.0009+999.1+99.91+9.991+0.9991
=1.0009(1000+100+10+1﹚+0.9991(1+10+100+1000)
=1111*(1.0009+0.9991)
=2222
题目中是否缺失了10.009?