理解百分比
Understanding Percentages
理解百分号（%）的意思；知道百分数表示“每一百份中的几份”；会将百分数写成分母是100的分数和小数。
Understand the per cent symbol (%); know that per cent means ‘number of parts per hundred’; write percentages as a fraction with denominator 100 and as a decimal
学习证据 / Evidence
- 把35%写成分数35/100和小数0.35。
- 在10×10的方格图中涂出40%，并写出分数40/100。
- 解释100%表示整体，50%表示一半。
- Write 35% as 35/100 and as 0.35
- Shade 40% of a 10×10 grid and write the fraction 40/100
- Explain that 100% means the whole, 50% means half
评估问题 / Assessment
如果商店广告宣传“打五折”，{{name}}能解释这意味着半价，并把50%写成分数和小数吗？
If a shop advertises 50% off, can {{name}} explain that this means half price — and write 50% as both a fraction and a decimal?