比与比例问题
Ratio Problems
解决涉及两个数量相对大小的问题，其中缺失值可以利用整数乘法和除法知识求出。
Solve problems involving the relative sizes of two quantities where missing values can be found by using integer multiplication and division facts
学习证据 / Evidence
- 如果红珠与蓝珠的数量比是3:5，并且有15颗蓝珠，求红珠的数量。
- 利用乘法知识求出缺失值：“每2个苹果对应5个橙子；如果有20个橙子，有多少个苹果？”
- 解释在比的情境中两个数量之间的乘法关系。
- If the ratio of red to blue beads is 3:5 and there are 15 blue beads, find the number of red beads
- Use multiplication facts to find the missing value: 'For every 2 apples there are 5 oranges; if there are 20 oranges, how many apples?'
- Explain the multiplicative relationship between two quantities in a ratio context
评估问题 / Assessment
如果一个食谱中每200克面粉需要3个鸡蛋，{{name}}能算出600克面粉需要多少个鸡蛋吗？
If a recipe uses 3 eggs for every 200g of flour, can {{name}} work out how many eggs would be needed for 600g of flour?