小数与百分数表示法

正确读、写和使用小数与百分数记法——如小数、小数点、十分位、百分位、千分位、百分数、百分比、%符号、转换、有限小数——并理解分数、小数和百分数之间的关系：它们是表示同一数值的三种方式。

Read, write, and use decimal and percentage notation correctly — decimal, decimal point, tenths, hundredths, thousandths, percentage, per cent, % symbol, convert, terminating decimal — and understand the relationships between fractions, decimals, and percentages as three ways of expressing the same value

学习证据 / Evidence

• 正确读写小数，识别每个数位的值（个位、十分位、百分位）。
• 正确使用%符号，并解释“百分之”表示“每一百中的多少”。
• 能在简单的分数、小数和百分数之间进行转换（例如1/2 = 0.5 = 50%），并解释它们为什么相等。

• Read and write decimal numbers correctly, identifying the value of each digit (ones, tenths, hundredths)
• Use the % symbol correctly and explain that per cent means 'out of 100'
• Convert between simple fractions, decimals, and percentages (e.g. 1/2 = 0.5 = 50%) and explain why they are equal

评估问题 / Assessment

如果{{name}}看到写着的“0.5”和“50%”，他们能说明这两个表示的是同样的数量，并也把它们写成分数吗？

If {{name}} saw '0.5' and '50%' written down, could they explain that they both mean the same amount — and write them as a fraction too?