怎样简便怎样算.三克油.

问题描述:

怎样简便怎样算.三克油.
8.8-7.72+10.2-2.28 0.25×39+0.25
1个回答 分类:数学 2014-10-19

问题解答:

我来补答
8.8-7.72+10.2-2.28
=(8.8+10.2)-(7.72+2.28)
=19-10
=9
0.25×39+0.25
=0.25×(39+1)
=0.25×40
=10
 
 
展开全文阅读
剩余:2000