[讨论]一道初中的方程题引起的思考
<p><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: ""; mso-hansi-font-family: ""; mso-bidi-font-family: ""; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">一轮船沿河航行与相距</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: ""; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">48</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: ""; mso-hansi-font-family: ""; mso-bidi-font-family: ""; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">千米的码头间。往返一次需要</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: ""; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">10</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: ""; mso-hansi-font-family: ""; mso-bidi-font-family: ""; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">个小时，如果轮船在静水中的速度是</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: ""; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">10</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: ""; mso-hansi-font-family: ""; mso-bidi-font-family: ""; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">千米每小时，求</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: ""; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;"></span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: ""; mso-hansi-font-family: ""; mso-bidi-font-family: ""; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">水流的速度</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: ""; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;"> .</span></p><p><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: ""; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体;">大家都来看看这道题,这是一道初中的数学题,不知道有没有人看出什么毛病.</span></p> <p>我自己先发表下见解 </p><p>假设水流速度是不变的情况下 方程应该是这样的<br/>5×（10-X）+5×（10+X）=48×2<br/>这道题根本就把水的逆流和顺流给忽略了 对我们现在的思维来说这道题完全是错误的题目</p> <p>假设水流速度是不变的情况下 方程应该是这样的<br/>48/(10-X)+48/(10+X)=10</p><p>X=2</p><p></p> <p>同意3楼的。楼主出的题目自己的解法都是错误的，真不知道以前你是这么考过来的o(∩_∩)o...哈哈</p> <p>三楼正解</p> <p>顺流和逆流所用的时间明显不一样的</p><p>你把水的顺流和逆流给忽略了犯了先入为主的错误 </p> <p>题目没有什么问题，怀疑楼主的数学水平，如何度过重重考关（北京的就算了，及格的水平）</p> 严重同意楼上几位的意见,LZ理解错了. 常识性错误！