________÷12=15:________=0.25=數(shù)學(xué)公式=________%

3    60    25
分析:解答此題的關(guān)鍵是0.25,把0.25化成分?jǐn)?shù)并化簡(jiǎn)是;根據(jù)分?jǐn)?shù)與除法的關(guān)系,=1÷4,再根據(jù)商不變的性質(zhì),被除數(shù)、除數(shù)都乘3就是3÷12;根據(jù)比與分?jǐn)?shù)的關(guān)系,=1:4,再根據(jù)比的基本性質(zhì),比的前、后項(xiàng)都乘15就是15:60;把0.25的小數(shù)點(diǎn)向右移動(dòng)兩位,添上百分號(hào)就是25%.由此進(jìn)行轉(zhuǎn)化并填空.
解答:3÷15=15:60=0.25==25%;
故答案為:3,60,4,25.
點(diǎn)評(píng):此題主要是考查除式、小數(shù)、分?jǐn)?shù)、百分?jǐn)?shù)、比之間的關(guān)系及轉(zhuǎn)化,利用它們之間的關(guān)系和性質(zhì)進(jìn)行轉(zhuǎn)化即可.
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