正负硬币相加

几何画板及绘图内容加载中，请稍等……

2016-08-09 13:26

圆函数几何作图

①本范例演示了正负数的加法运算，通过动态图形直观展示数值的叠加效果；②涉及的核心数学概念包括整数运算、数轴表示、符号规则；③作图要点——从下方『构造摘要』提炼用到了『Circle』命令来绘制圆形对象，如A、B、A_1等，用于表示数值的几何化；④适合初中数学教学，用于帮助学生理解抽象的数运算；

GeoGebra 命令及参数

Circle(A_1, B_1) → c_1
Circle(A_2, B_2) → c_2
Circle(A_{11}, B_{11}) → c_{11}
Circle(A_{19}, B_{19}) → c_{19}
Circle(A_{22}, B_{22}) → c_4
Circle(A_{23}, B_{23}) → c_3
Circle(A_{20}, B_{20}) → c_6
Circle(A_{21}, B_{21}) → c_5
Circle(A_{26}, B_{26}) → c_8
Circle(A_{27}, B_{27}) → c_7
Circle(A_{24}, B_{24}) → c_{10}
Circle(A_{25}, B_{25}) → c_9
Circle(A_{30}, B_{30}) → c_{13}
Circle(A_{31}, B_{31}) → c_{12}
Circle(A_{28}, B_{28}) → c_{15}
Circle(A_{29}, B_{29}) → c_{14}
Circle(A_{34}, B_{34}) → c_{17}
Circle(A_{35}, B_{35}) → c_{16}
Circle(A_{32}, B_{32}) → c_{20}
Circle(A_{33}, B_{33}) → c_{18}
Circle(A_{38}, B_{38}) → c_{22}
Circle(A_{39}, B_{39}) → c_{21}
Circle(A_{36}, B_{36}) → c_{24}
Circle(A_{37}, B_{37}) → c_{23}
Circle(A_{40}, B_{40}) → c_{25}
Circle(A_{41}, B_{41}) → c_{26}
Circle(A_{42}, B_{42}) → c_{27}
Circle(A_{43}, B_{43}) → c_{30}
Circle(A_{45}, B_{45}) → c_{28}
Circle(A_{44}, B_{44}) → c_{29}
Circle(A_{46}, B_{46}) → c_{33}
Circle(A_{47}, B_{47}) → c_{32}
Circle(A_{48}, B_{48}) → c_{31}
Circle(A_{51}, B_{51}) → c_{34}
Circle(A_{50}, B_{50}) → c_{35}
Circle(A_{49}, B_{49}) → c_{36}