1
2
=
1
4
=
3
4
=
1
5
=
2
5
=
4
5
=
1
8
=
3
8
=
5
8
=
7
8
=
分析:分?jǐn)?shù)化成小數(shù),用分子除以分母,然后再根據(jù)小數(shù)除法的計(jì)算方法進(jìn)行計(jì)算.
解答:解:
1
2
=0.5,
1
4
=0.25,
3
4
=0.75,
1
5
=0.2,
2
5
=0.4,
4
5
=0.8,
1
8
=0.125,
3
8
=0.375,
5
8
=0.625,
7
8
=0.875.
點(diǎn)評(píng):分?jǐn)?shù)化成小數(shù),用分子除以分母,然后再進(jìn)一步解答.
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