小数位值（11岁及以上）
Decimal place value (age 11+)
将数字和测量值四舍五入到适当的精确度，包括指定的小数位数或有效数字。
Round numbers and measures to an appropriate degree of accuracy including to a specified number of decimal places or significant figures
学习证据 / Evidence
- 将数字四舍五入到指定的小数位数
- 将数字四舍五入到指定的有效数字位数
- 根据给定情境选择合适的精确度
- Round numbers to a given number of decimal places
- Round numbers to a given number of significant figures
- Choose an appropriate degree of accuracy for a given context
评估问题 / Assessment
{{name}}能否将像12.3746 km这样的测量值四舍五入到2位小数（12.37 km）或3位有效数字（12.4 km），并解释每种精确度在什么时候是合适的？
Can {{name}} round a measurement like 12.3746 km to 2 decimal places (12.37 km) or 3 significant figures (12.4 km) — and explain when each level of precision is appropriate?