1÷4=
(  1  )
(  4  )
=
(5 )
(20)
=4:
16
16
=
25
25
%=
0.25
0.25
(小數(shù))
分析:解決此題關(guān)鍵在于抓住已知算式1÷4,得小數(shù)商為0.25,再化成百分?jǐn)?shù)25%,1÷4還可以改寫成比1:4,再根據(jù)比的基本性質(zhì)改寫成4:16,1÷4還可以寫成分?jǐn)?shù)
1
4
,運(yùn)用分?jǐn)?shù)的基本性質(zhì)改寫成
5
20
解答:解:1÷4=
1
4
=
5
20
=1:4=4:16=0.25=25%
故答案為:
(  1  )
(  4  )
,
(5 )
(20)
,16,25,0.25.
點(diǎn)評(píng):此題考查運(yùn)用除法、分?jǐn)?shù)、小數(shù)、比之間的關(guān)系和性質(zhì)解決問題的.
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