1.5÷0.4=3…0.3．
正確
分析：在計(jì)算有余數(shù)的除法時(shí)，往往根據(jù)商不變的規(guī)律把對(duì)應(yīng)被除數(shù)與除數(shù)縮小或擴(kuò)大相同的倍數(shù)，商不變，但余數(shù)相對(duì)應(yīng)的縮小或擴(kuò)大對(duì)應(yīng)的倍數(shù)，要想得到原來(lái)的余數(shù)，只要對(duì)應(yīng)擴(kuò)大或縮小相同的倍數(shù)即可，由此規(guī)律解答即可．
解答：把1.5÷0.4變?yōu)?5÷4=3…3，
商相同，余數(shù)對(duì)應(yīng)擴(kuò)大10倍，原式的余數(shù)為3÷10=0.3；
故答案為：正確．
點(diǎn)評(píng)：此題主要利用有余數(shù)的除法中，被除數(shù)與除數(shù)縮小或擴(kuò)大相同的倍數(shù)，商不變，余數(shù)相對(duì)應(yīng)的縮小或擴(kuò)大對(duì)應(yīng)的倍數(shù)，掌握這一規(guī)律，靈活解答問(wèn)題．
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