小数的位值
Decimal place value
把一位小数四舍五入到最接近的整数
Round decimals with one decimal place to the nearest whole number
学习证据 / Evidence
- 把3.7四舍五入为4，把3.2四舍五入为3
- 在数轴上标出6.5在6和7之间的位置，并判断它四舍五入为7
- 把一组一位小数分别四舍五入，并解释四舍五入的规则
- Round 3.7 to 4 and 3.2 to 3
- Place 6.5 on a number line between 6 and 7 and decide it rounds to 7
- Round a set of one-decimal-place numbers and explain the rounding rule
评估问题 / Assessment
如果{{name}}量出一个物体的长度是3.7米，他/她能说出这个数应该四舍五入到3米还是4米，并解释原因吗？
If {{name}} measures something as 3.7 m, can they tell you whether that rounds to 3 m or 4 m — and explain why?