0.9+0.99+0.999+0.9999+0.99999(简便计算）无

分类: 作业答案 • 2021-12-19 11:17:57

问题描述：

0.9+0.99+0.999+0.9999+0.99999(简便计算）
无

答

0.9+0.99+0.999+0.9999+0.99999+0.1+0.01+0.001+0.0001+0.00001-（0.1+0.01+0.001+0.0001+0.00001）
=5-0.11111
=4.88889

答

=1*5-0.7-0.01-0.001-0.0001-0.00001
=5-0.11111
=4.88889

答

=1*5-.1-.01-.001-.0001
=5-.1111
=4.8889

答

0.9+0.99+0.999+0.9999+0.99999
=1-0.1+1-0.01+1-0.001+1-0.0001+1-0.00001
=5-0.11111
=4.88889

答

=5-0.1-0.01-0.001-0.0001-0.00001
=5-0.11111
=4.88889

答

=(1-0.1)+(1-0.01)+(1-0.001).....+(1-0.00001)=5-0.11111=4.88889