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4-1÷5-
15
×4.
分析:把1÷5的结果写成分数为
1
5
1
5
×4的结果为
4
5
,然后运用减法的性质简算.
解答:解:4-1÷5-
1
5
×4,
=4-
1
5
-
4
5

=4-(
1
5
+
4
5
),
=4-1,
=3.
点评:简便计算主要是运用所学性质与定律以及数与数之间的特殊关系灵活进行,此题考查了对数字的灵活处理以及对减法性质的掌握情况.
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