﹙1+0.112+0.123﹚×﹙0.112+0.123+0.134﹚-﹙1+0.112+0.123+0.134﹚×﹙0.112+0.123﹚简便计算请顺便讲讲道理吧!
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/09 22:05:11
![﹙1+0.112+0.123﹚×﹙0.112+0.123+0.134﹚-﹙1+0.112+0.123+0.134﹚×﹙0.112+0.123﹚简便计算请顺便讲讲道理吧!](/uploads/image/z/1772705-65-5.jpg?t=%EF%B9%991%2B0.112%2B0.123%EF%B9%9A%C3%97%EF%B9%990.112%2B0.123%2B0.134%EF%B9%9A-%EF%B9%991%2B0.112%2B0.123%2B0.134%EF%B9%9A%C3%97%EF%B9%990.112%2B0.123%EF%B9%9A%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%E8%AF%B7%E9%A1%BA%E4%BE%BF%E8%AE%B2%E8%AE%B2%E9%81%93%E7%90%86%E5%90%A7%21)
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﹙1+0.112+0.123﹚×﹙0.112+0.123+0.134﹚-﹙1+0.112+0.123+0.134﹚×﹙0.112+0.123﹚简便计算请顺便讲讲道理吧!
﹙1+0.112+0.123﹚×﹙0.112+0.123+0.134﹚-﹙1+0.112+0.123+0.134﹚×﹙0.112+0.123﹚简便计算
请顺便讲讲道理吧!
﹙1+0.112+0.123﹚×﹙0.112+0.123+0.134﹚-﹙1+0.112+0.123+0.134﹚×﹙0.112+0.123﹚简便计算请顺便讲讲道理吧!
设 0.112+0.123=a
原式=﹙1+a﹚×﹙a+0.134﹚-﹙1+a+0.134﹚×a
=a+a²+0.134a+0.134 - (a+a²+0.134a)
=0.134
﹙1+0.112+0.123﹚×﹙0.112+0.123+0.134﹚-﹙1+0.112+0.123+0.134﹚×﹙0.112+0.123﹚简便计算请顺便讲讲道理吧!
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