精英家教网 > 小学数学 > 题目详情
2
5
+
1
5
=
3
10
错误
错误
分析:同分母分数相加减的运算法则为:同分母分数相加减,分子相加减,分母不变.由此可知,
2
5
+
1
5
=
3
5
解答:解:根据同分母分数相加减的计算法则可知,
2
5
+
1
5
=
3
5

题目中算式分母也进行了相加,所以是错误的.
故答案为:错误.
点评:本题考查了学生对于同分母分数相加减的运算法则的理解.
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