分数除法（单位分数）
Dividing fractions (unit fractions)
理解并计算单位分数除以非零整数的除法（例如 1/3 ÷ 4 = 1/12）；使用可视化模型以及乘除法的关系来解释结果。
Interpret and compute division of a unit fraction by a non-zero whole number (e.g. 1/3 ÷ 4 = 1/12); use visual models and the relationship between multiplication and division to explain the result
学习证据 / Evidence
- 计算 (1/3) ÷ 4 = 1/12，并使用将1/3分成4等份的可视化模型进行解释
- 为 (1/6) ÷ 3 编一个故事情境并解答
- 通过展示 (1/12) × 4 = 1/3 来验证 (1/3) ÷ 4 = 1/12
- Compute (1/3) ÷ 4 = 1/12 and explain using a visual model of splitting 1/3 into 4 equal parts
- Create a story context for (1/6) ÷ 3 and solve it
- Verify (1/3) ÷ 4 = 1/12 by showing (1/12) × 4 = 1/3
评估问题 / Assessment
如果{{name}}有1/3袋大米，并把它分成4等份，他们能算出每一份占整袋的几分之几，并解释为什么答案小于1/3吗？
If {{name}} has 1/3 of a bag of rice and splits it into 4 equal portions, can they work out what fraction of the whole bag each portion is — and explain why the answer is smaller than 1/3?