墨渍谜题:树形图计数练习
几何画板及绘图内容加载中,请稍等……
① 本范例通过一个“墨渍谜题”(Klecksaufgabe)场景,演示如何用树形图(Baumdiagramm)系统地列出所有可能的组合结果,帮助学生直观理解计数问题。② 核心数学概念是概率统计中的计数原理(乘法原理)与树形图表示法,涉及从多个集合中选取元素并排列组合的完整过程。③ 作图要点:使用GeoGebra的Textfield、Shuffle、Element、Join、Polygon、Append、Remove、Defined、Line、Segment、Mirror、Text等命令,构建了多个颜色对象(Blue、Green、Orange、Red、Purple、Gray等)以及验证按钮(btnValidate)、显示答案(showanswer)、重试(btnTryAgain)、新建(btnNew)等交互控件,通过输入框(InputBox)和动态文本(textCountCorrect)实现练习与反馈。④ 适合小学5-6年级或初中低年级学生,用于课堂练习或家庭作业,培养逻辑思维和系统枚举能力,也可作为教师演示工具。
GeoGebra 命令及参数
Textfield(input1) → InputBox1Textfield(input2) → InputBox2Shuffle(Sequence[i, i, 1, 8]) → ListExNum, {5, 1, 6, 3, 8, 4, 2, 7}Shuffle({1, 2, 3, 4, 5, 6}) → ListGesucht, {2, 5, 1, 3, 4, 6}Element(MatrixZahlen, exNum, gesucht) → solShuffle({1, 2}) → ListModus, {1, 2}Join({{1}, ListModus}) → ListeModusRealPolygon(PtopLeftCornerFeedback, PtopRightCornerFeedback, PbottomRightCornerFeedback, PbottomLeftCornerFeedback) → rectangleCorrect, rectangleCorrectS3, rectangleCorrectS4, rectangleCorrectS2, rectangleCorrectS1Shuffle(Sequence[Random[0, 10], i, 1, 100]) → randomNosForX, {8, 9, 7, 9, 4, 1, 2, 5, 2, 9, 9, 4, 1, 0, 1, 0, 1, 9, 6, 4, 2, 0, 2, 1, 5, 10, 2, 7, 8, 10, 4, 2, 6, 4, 1, 8, 3, 5, 8, 6, 10, 1, 0, 8, 8, 3, 5, 8, 9, 1, 0, 9, 3, 3, 5, 9, 9, 7, 1, 8, 0, 6, 5, 2, 6, 10, 0, 8, 4, 0, 1, 9, 5, 4, 1, 2, 8, 3, 3, 1, 6, 2, 9, 4, 6, 9, 1, 8, 7, 8, 0, 6, 9, 5, 0, 2, 5, 0, 8, 3}Element(randomNosForX, Mod[questionCount, 100] + 1) → numXShuffle(Sequence[Random[0, 10], i, 1, 100]) → randomNosForY, {10, 8, 1, 2, 2, 6, 2, 7, 5, 3, 3, 3, 1, 1, 8, 2, 9, 9, 1, 10, 0, 6, 3, 0, 9, 9, 2, 9, 3, 6, 1, 8, 7, 9, 2, 1, 0, 0, 1, 8, 2, 4, 10, 8, 1, 5, 0, 6, 10, 5, 2, 4, 3, 1, 6, 7, 0, 3, 9, 5, 5, 4, 5, 10, 6, 5, 7, 9, 4, 0, 6, 5, 2, 9, 0, 0, 3, 2, 5, 3, 4, 10, 7, 4, 9, 8, 8, 0, 2, 0, 10, 6, 2, 7, 9, 3, 5, 10, 8, 4}Element(randomNosForY, Mod[questionCount, 100] + 1) → numYAppend(true, Sequence[If[randomNosForX(i) ≟ randomNosForX(i - 1), false, true], i, 2, 100]) → stayXAppend(true, Sequence[If[randomNosForY(i) ≟ randomNosForY(i - 1), false, true], i, 2, 100]) → stayYRemove(Sequence[If[stayX(i), randomNosForX(i), 0], i, 1, 100], Sequence[0, i, 1, 100]) → randomNosForXwithoutRepeatRemove(Sequence[If[stayY(i), randomNosForY(i), 0], i, 1, 100], Sequence[0, i, 1, 100]) → randomNosForYwithoutRepeatElement(randomNosForXwithoutRepeat, Mod[questionCount, Length[randomNosForXwithoutRepeat]] + 1) → numXwithoutRepeatElement(randomNosForYwithoutRepeat, Mod[questionCount, Length[randomNosForYwithoutRepeat]] + 1) → numYwithoutRepeatDefined(input1) → fixedLine(BaumZentrum, yAxis) → AchseSymmSegment(B, BaumAst1) → fSegment(D, BaumAst2) → gMirror(D, Line[BaumAst1, yAxis]) → D'Mirror(BaumAst2, Line[BaumAst1, yAxis]) → E'Segment(D', E') → g'Mirror(Anchor6, Line[BaumAst1, yAxis]) → Anchor5Mirror(Anchor2, AchseSymm) → Anchor1Mirror(Anchor6, AchseSymm) → Anchor3Mirror(Anchor5, AchseSymm) → Anchor4Text(HelperText1, Anchor1, false, true, 0, 0) → Text7Text(HelperText2, Anchor2, false, true, 0, 0) → Text8Text(HelperText3, Anchor3, false, true, 0, 0) → Text9Text(HelperText4, Anchor4, false, true, 0, 0) → Text10Text(HelperText5, Anchor5, false, true, 0, 0) → Text11Text(HelperText6, Anchor6, false, true, 0, 0) → Text12Mirror(AnchorBT2, AchseSymm) → AnchorBT1Mirror(AnchorBT6, AchseSymm) → AnchorBT3Mirror(AnchorBT6, Line[BaumAst1, yAxis]) → AnchorBT5Mirror(AnchorBT5, AchseSymm) → AnchorBT4Text(HelperBT1, AnchorBT1, false, true, 0, 0) → Text1Text(HelperBT2, AnchorBT2, false, true, 0, 0) → Text3Text(HelperBT3, AnchorBT3, false, true, 0, 0) → Text4Text(HelperBT4, AnchorBT4, false, true, 0, 0) → Text5Text(HelperBT5, AnchorBT5, false, true, 0, 0) → Text6Text(HelperBT6, AnchorBT6, false, true, 0, 0) → Text13Text(Text16, AnchorInput + (0.7, 0.15), false, true, 0, 0) → Text17
AI 绘图提示语参考
画一个树形图,包含两个圆形的根节点,分别代表X和Y两个集合。每个集合中有多个元素,元素之间有连线连接。图中还包含多个矩形,代表正确答案和错误答案。图形的中心有一个垂直线,代表Y轴。图形的左侧和右侧各有一个圆形的支点,代表树形图的根节点。图形的上方和下方各有一个圆形的支点,代表树形图的叶节点。图形的左侧和右侧各有一个矩形,代表正确答案和错误答案。图形的上方和下方各有一个矩形,代表正确答案和错误答案。图形的中心有一个圆形的标签,代表X和Y两个集合的交集。
以上提示语为根据原始绘图命令整理而来,仅供参考。