3:8=
()()
=
3
3
÷
8
8
=12:
32
32
=
9
9
:24=
0.375
0.375
小數(shù).
分析:解決此題關(guān)鍵在于3:8,3:8用比的前項3做分子,比的后項8做分母可化成分?jǐn)?shù)
3
8
;3:8用比的前項3做被除數(shù),比的后項8做除數(shù)可化成3÷8;3:8的前項和后項同時乘4可化成
12:32;3:8的前項和后項也可以同時乘3可化成9:24;3:8用比的前項除以后項得比值0.375;由此進(jìn)行轉(zhuǎn)化并填空.
解答:解:3:8=
3
8
=3÷8=12:32=9:24=0.375;
故答案為:
3
8
,3,8,32,9,0.375.
點評:此題考查比、分?jǐn)?shù)、除法、和小數(shù)之間的轉(zhuǎn)化,根據(jù)它們之間的關(guān)系和性質(zhì)進(jìn)行轉(zhuǎn)化.
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