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15÷
4
5
+15÷
1
5
=15÷(
4
5
+
1
5
)=15
×
×
.(判断对错)
分析:通过观察,此题应先算除法,再算加法.而原题中错用了除法的性质,除法的性质应是除数相同,而不是被除数相同,即(a+b)÷c=a÷c+b÷c.
解答:解:15÷
4
5
+15÷
1
5

=15×
5
4
+15×5
=
75
4
+75
=18
3
4
+75
=93
3
4

故答案为:×.
点评:此题考查了学生对除法运算性质的掌握与运用.
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