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230问答网 > 3⼀4减3⼀8加五分之翼能用简便方法计算吗？能用该怎么用？

3⼀4减3⼀8加五分之翼能用简便方法计算吗？能用该怎么用？

2025-03-31 01:42:04

推荐回答（3个）

回答1：

不能，只能直接通分。
（答案为：40分之23=0.575）

回答2：

3/4 - 3/8 + 1/5 把该式进行通分为：
3*10/4*10 - 3*5/8*5 + 1*8/5*8
=30/40 - 15/40 + 8/40
=(30 - 15 + 8)/40
=23/40

回答3：

0.375+0.2

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