理解分数
Understanding fractions
解决涉及用简单分数进行比例缩放的问题，以及涉及简单比率的问题。
Solve problems involving scaling by simple fractions and problems involving simple rates
学习证据 / Evidence
- 一份供4人食用的食谱需要200克面粉，6人需要多少克？
- 如果3千克的价格是12英镑，那么5千克要多少钱？
- 把一个图形按1/2的比例缩放，并求出新的尺寸。
- A recipe for 4 people needs 200 g of flour — how much for 6 people?
- If 3 kg costs £12, how much does 5 kg cost?
- Scale a shape by a factor of 1/2 and find the new dimensions
评估问题 / Assessment
如果一份食谱供4人食用，而{{name}}想按6人份来做，能否把每种食材都按比例增加——例如把“2杯面粉”改成“3杯”？
If a recipe serves 4 and {{name}} wants to make it for 6, can they scale up each ingredient — for example, changing '2 cups of flour' to '3 cups'?