一个量是另一个量的几分之几
One Quantity as a Fraction
把一个量表示为另一个量的分数，结果可能小于1或大于1，并能结合具体情境解释其含义。
Express one quantity as a fraction of another where the result may be less than 1 or greater than 1, and interpret the meaning in context
学习证据 / Evidence
- 将45分钟表示为2小时的几分之几（= 3/8）
- 把一个较大的数量表示为较小数量的分数，并解释为什么结果大于1
- 化简所得分数，并结合原始情境解释其含义
- Express 45 minutes as a fraction of 2 hours (= 3/8)
- Express a larger quantity as a fraction of a smaller one and explain why the result exceeds 1
- Simplify the resulting fraction and interpret its meaning in the original context
评估问题 / Assessment
如果班里男生有15人、女生有20人，{{name}} 能说出男生人数占全班人数的几分之几，并判断这个分数比二分之一小还是大吗？
If there are 15 boys and 20 girls in a class, can {{name}} express the number of boys as a fraction of the whole class and say whether that fraction is less than or greater than a half?