小数位值
Decimal place value
在同一个计量系统内，使用小数记数法（最多三位小数）在不同大小的标准计量单位之间进行换算（如 5 cm 换算成 0.05 m）；在长度、质量、体积和时间的较小单位与较大单位之间进行换算。
Convert among different-sized standard measurement units within a given system (e.g. 5 cm to 0.05 m) using decimal notation to up to three decimal places; convert between smaller and larger units of length, mass, volume, and time
学习证据 / Evidence
- 使用小数记数法将 3,250 g 换算为 3.25 kg
- 将 0.45 km 换算为 450 m
- 用 10 的幂解释 mm、cm、m 和 km 之间的关系
- Convert 3,250 g to 3.25 kg using decimal notation
- Convert 0.45 km to 450 m
- Explain the relationship between mm, cm, m, and km using powers of 10
评估问题 / Assessment
如果{{name}}需要把 5 cm 换算成米并用小数写出答案，能否做到？同时还能把 2.45 kg 换算成克吗？
If {{name}} needs to convert 5 cm to metres and write the answer as a decimal, can they do it — and also convert 2.45 kg into grams?