(1)6.43+2.58-6.43+2.58

问题描述:

(1)6.43+2.58-6.43+2.58
(2)6.6*9.8
1个回答 分类:数学 2014-11-06

问题解答:

我来补答
6.43+2.58-6.43+2.58
=6.43-6.43+2.58+2.58
=5.16
6.6*9.8
=6.6*10-6.6*0.2
=66-1.32
=64.68
 
 
展开全文阅读
剩余:2000