分数与小数的等价关系
Fraction-Decimal Equivalents
认识并写出 1/4、1/2 和 3/4 对应的小数。
Recognise and write decimal equivalents of 1/4, 1/2, and 3/4
学习证据 / Evidence
- 说出 1/2 = 0.5、1/4 = 0.25、3/4 = 0.75。
- 在分类活动中将分数与对应的小数配对。
- 借助百格图解释为什么 1/4 = 25/100 = 0.25。
- State that 1/2 = 0.5, 1/4 = 0.25, 3/4 = 0.75
- Match fractions to decimals in a sorting activity
- Explain why 1/4 = 25/100 = 0.25 using a hundredths grid
评估问题 / Assessment
如果食谱需要 3/4 杯面粉，{{name}}能不用查资料就说出它的小数是多少吗？
If a recipe calls for 3/4 of a cup of flour, can {{name}} tell you what that is as a decimal — without looking it up?