(9)12
=6÷
8
8
=
24
24
:32=0.75=
75
75
%.
分析:解答此題的突破口是0.75,把0.75化成分?jǐn)?shù)并化簡是
3
4
,根據(jù)分?jǐn)?shù)的基本性質(zhì),分子、分母都乘3就是
9
12
;根據(jù)分?jǐn)?shù)與除法的關(guān)系,
3
4
=3÷4,再根據(jù)商不變的性質(zhì),被除數(shù)、除數(shù)都乘2就是6÷8;根據(jù)比與分?jǐn)?shù)的關(guān)系,
3
4
=3:4,再根據(jù)比的基本性質(zhì),比的前、后項(xiàng)都乘8就是24:32;把0.75的小數(shù)點(diǎn)向右移動(dòng)兩位,添上百分號就是75%.
解答:解:
9
12
=6÷8=24:32=0.75=75%.
故答案為:9,8,24,75.
點(diǎn)評:本題主要是考查除式、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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