分数四则运算测验：演示分数加减乘除的几何构造与计算方法

GeoGebra 命令及参数

1. Random(2, 12) → d1
2. Random(2, 9) → m
3. RandomUniform(0, 1) → prob
4. Random(2, 12) → d2
5. Random(1, d1 - 1) → n1
6. Random(1, d2 - 1) → n2
7. If(prob ≤ 0.6, qList(1, 1), prob ≤ 0.8, qList(2, 1), qList(3, 1)) → f1
8. If(prob ≤ 0.6, qList(1, 2), prob ≤ 0.8, qList(2, 2), qList(3, 2)) → f2
9. FractionText(f1) → textF1
10. FractionText(f2) → textF2
11. If(prob ≤ 0.8, Random[1, 4], RandomElement[{1, 3, 4}]) → qtype
12. If(qtype ≟ 1, "+", qtype ≟ 2, "-", qtype ≟ 3, "×", qtype ≟ 4, "÷") → operation
13. If(qtype ≟ 1, f1 + f2, qtype ≟ 2, f1 - f2, qtype ≟ 3, (f1 * f2), qtype ≟ 4, f1 / f2) → ans
14. FractionText(ans) → textAns
15. Textfield(input1) → InputBox1
16. Textfield(input2) → InputBox2
17. Denominator(ans) → ans2
18. Numerator(ans) → ans1
19. Segment(A, B) → f