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中学生数学:高中版 |
| Adding machine and calculating machine中学生数学:高中版论文 |
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【题名】:Adding machine and calculating machine中学生数学:高中版论文(Adding machine and calculating machineZhongXueShengShuXue:GaoZhongBanLunWen) 【关键词】:加法运算 计算器 高中 数学 双语学习 英语 【keywords】:JiaFaYunSuan JiSuanQi GaoZhong ShuXue ShuangYuXueXi YingYu 【作者】:无 【来源】: 知识词典 【期刊名称】:中学生数学:高中版(ZhongXueShengShuXue:GaoZhongBan) 【国际标准刊号】:1003-1901 【国内统一刊号】:11-1531 【作者单位】:不详(BuXiang) 【分类号】:G633.6 G633.41 【页码】:-F003-F003,38 【出版年】:2005.03S In 1642 the French mathematician Blaise Pascal(1623-1662) invented a machine;.that could add and subtract. It had.wheels that each had: 1 to 10 marked off along its circumference. When the wheel at the right, representing units, made one complete circle, it engaged the wheel to its left, represents tens, and moved it forward one notch.
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