3.85×0.25=385×
0.0025
0.0025
=38.5×
0.025
0.025
=0.385×
2.5
2.5
分析:根據(jù)“一個因數(shù)擴(kuò)大幾倍(0除外),則另一個因數(shù)要縮小相同的倍數(shù),積不變”的規(guī)律即可作出解答.
解答:解:3.85×0.25=385×0.0025=38.5×0.025=0.385×2.5;
故答案為:25,0.025,2.5.
點(diǎn)評:本題主要是利用積的變化規(guī)律解決問題.
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