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58问答库 > 一根木料，锯3段要9分钟，照这样计算，锯6段要多少分钟。用比例解

一根木料，锯3段要9分钟，照这样计算，锯6段要多少分钟。用比例解

2025-03-28 22:43:13

推荐回答（3个）

回答（1）：

解：设锯6段要x分钟。
9∶（3-1）=x∶(6-1)
9∶2=x∶5
2x=9×5
2x=45
x=22.5
答：锯6段要22.5分钟。

回答（2）：

锯3段，锯3-1=2次，
锯6段，锯6-1=5次，
设锯6段要x分钟，
9:2=x：5，
x=9×5÷2=22.5，要22.5分钟

回答（3）：

9：（3-1）=x:(6-1)
9:2=x:5
2x=45
x=22.5

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