题目内容
分数单位是
的最简真分数有________个,它们的和是________.
4 2
分析:最简真分数的意义:分子分母是互质数并且分子小于分母的分数就是最真简分数,据此找出分数单位是
的最简真分数,然后数出几个,再把它们加起来求和即可.
解答:分数单位是
的最简真分数有:
,
,
,
,共有4个;
+
+
+
=2;
故答案为:4,2.
点评:本题主要考查最简真分数的意义.
分析:最简真分数的意义:分子分母是互质数并且分子小于分母的分数就是最真简分数,据此找出分数单位是
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解答:分数单位是
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故答案为:4,2.
点评:本题主要考查最简真分数的意义.

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