例:算盘口诀中的“七去三进一和七上二去五进一”有什么区别吗?七去三进一:7=-3+10;七上二去五进一:7=+2-5+10,不都一样吗?这点我实在不明白,
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/10 04:05:00
![例:算盘口诀中的“七去三进一和七上二去五进一”有什么区别吗?七去三进一:7=-3+10;七上二去五进一:7=+2-5+10,不都一样吗?这点我实在不明白,](/uploads/image/z/2995430-14-0.jpg?t=%E4%BE%8B%EF%BC%9A%E7%AE%97%E7%9B%98%E5%8F%A3%E8%AF%80%E4%B8%AD%E7%9A%84%E2%80%9C%E4%B8%83%E5%8E%BB%E4%B8%89%E8%BF%9B%E4%B8%80%E5%92%8C%E4%B8%83%E4%B8%8A%E4%BA%8C%E5%8E%BB%E4%BA%94%E8%BF%9B%E4%B8%80%E2%80%9D%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB%E5%90%97%3F%E4%B8%83%E5%8E%BB%E4%B8%89%E8%BF%9B%E4%B8%80%EF%BC%9A7%3D-3%2B10%EF%BC%9B%E4%B8%83%E4%B8%8A%E4%BA%8C%E5%8E%BB%E4%BA%94%E8%BF%9B%E4%B8%80%EF%BC%9A7%3D%2B2-5%2B10%2C%E4%B8%8D%E9%83%BD%E4%B8%80%E6%A0%B7%E5%90%97%3F%E8%BF%99%E7%82%B9%E6%88%91%E5%AE%9E%E5%9C%A8%E4%B8%8D%E6%98%8E%E7%99%BD%2C)
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