小数和分数（10岁以上）
Decimals and fractions (age 10+)
将分数与除法联系起来，并会计算简单分数的小数等值（例如 3/8 = 0.375）；能在不同情境中熟记并运用简单分数、小数和百分数之间的等价关系。
Associate a fraction with division and calculate decimal fraction equivalents for simple fractions (e.g. 3/8 = 0.375); recall and use equivalences between simple fractions, decimals, and percentages in different contexts
学习证据 / Evidence
- 通过计算 3 ÷ 8，将 3/8 转换为 0.375
- 能凭记忆说出 1/5 = 0.2 = 20%
- 利用分数、小数和百分数之间的等价关系，比较 30%、1/3 和 0.35 的大小，并将它们排序
- Convert 3/8 to 0.375 by dividing 3 ÷ 8
- State that 1/5 = 0.2 = 20% from memory
- Use fraction–decimal–percentage equivalences to compare 30%, 1/3, and 0.35 and put them in order
评估问题 / Assessment
如果{{name}}在练习卷上看到 3/8，能把它转换成小数，并大致说出它对应的百分比是多少吗？
If {{name}} sees 3/8 written on a worksheet, can they convert it to a decimal — and also say roughly what percentage that is?