小数的大小比较
Comparing Decimals
比较两个小数（两位小数或最多三位小数）的大小，运用位值知识推理，并用 >、=、< 记录结果。
Compare two decimals to hundredths (or up to three decimal places) by reasoning about size using place-value understanding; record with >, =, <
学习证据 / Evidence
- 比较0.45和0.405，并解释哪个更大。
- 将3.142、3.14、3.2从小到大排列。
- 运用位值推理说明0.7 = 0.70 = 0.700。
- Compare 0.45 and 0.405 and explain which is greater
- Order 3.142, 3.14, 3.2 from smallest to largest
- Justify that 0.7 = 0.70 = 0.700 using place-value reasoning
评估问题 / Assessment
如果{{name}}比较0.45和0.54，能否不借助计算器，用位值知识解释哪个更大？
If {{name}} compares 0.45 and 0.54, can they use place value to explain which is bigger — without reaching for a calculator?