计算百分数
Calculating Percentages
解决有关计算一个数的百分之几的问题（例如360的15%），以及用百分数进行比较的问题。
Solve problems involving the calculation of percentages of amounts (e.g. 15% of 360) and the use of percentages for comparison
学习证据 / Evidence
- 通过先求出10%和5%，再合起来计算360的15%
- 比较两个以不同原价的百分比表示的折扣
- 利用已知的百分数关系，解释求一个量的任意百分数的策略
- Calculate 15% of 360 by finding 10% and 5% and combining
- Compare two discounts given as percentages of different original prices
- Explain a strategy for finding any percentage of an amount using known percentage facts
评估问题 / Assessment
如果一件毛衣原价40英镑，降价15%，{{name}}能算出折扣金额和售价是多少吗？
If a jumper originally costs £40 and is 15% off, can {{name}} work out how much the discount is and what the sale price would be?