在数轴上放置整数
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①本范例演示如何在数轴上放置和表示整数;②涉及的核心数学概念为数轴、整数、数的位置关系;③作图要点——从下方『构造摘要』提炼用到了 Sequence(数列)、Shuffle(随机排序)、Join(连接)、Element(元素)、Point(点)、Segment(线段)、Vector(向量)等 GeoGebra 命令/对象;④适合初中数学教学,用于帮助学生直观理解整数的顺序和位置。
GeoGebra 命令及参数
Sequence(RandomElement[{-1, 1}], i, 1, 4) → signsShuffle({1, 2, 3, 4, 5, 6, 7, 8, 9}) → list2, {5, 1, 3, 6, 9, 8, 4, 7, 2}Join({First[list2, n + 1], Sequence[0, i, 1, n - 1]}) → list3Sequence(First[Shuffle[list3], n + 1], i, 1, 100) → list4Sequence(First[Element[list4, i], n], i, 1, 100) → list5Sequence(Sum[Sequence[(Element[list5, i, k] * 10^(n - k)), k, 1, n]], i, 1, 100) → matrix1Shuffle(Unique[matrix1]) → list6, {530, 560, 506, 53, 536, 61, 360, 503, 500, 30, 306, 51, 105, 31, 653, 106, 605, 136, 63, 510, 163, 600, 501, 60, 103, 651, 561, 153, 160, 130, 300, 516, 310, 316, 150, 305, 1, 601, 650, 5, 6, 165, 531, 100, 630, 3, 36, 631, 10, 56, 16, 15}Element(list6, 1) → oneElement(list6, 2) → twoElement(list6, 3) → threeElement(list6, 4) → fourElement(list6, 5) → fiveElement(list6, 6) → sixElement(list6, 7) → sevenElement(list6, 8) → eightElement(list6, 9) → nineElement(list6, 10) → tenPoint(y = 0) → APoint(y = 0) → BPoint(y = 0) → CPoint(y = 0) → DPoint(y = 0) → EPoint(y = 0) → FPoint(y = 0) → GPoint(y = 0) → HPoint(y = 0) → IPoint(y = 0) → JSegment(K, L) → bSegment(M, Z) → fVector(A, N) → uVector(B, O) → vVector(C, P) → wVector(D, Q) → aVector(E, R) → cVector(F, S) → dVector(G, T) → eVector(H, U) → gVector(I, V) → hVector(J, W) → i