两位数的两个数字
The two digits of a two-digit number
理解两位数的两个数字分别表示几个十和几个一
Understand that the two digits of a two-digit number represent amounts of tens and ones
学习证据 / Evidence
- 能解释在47中，4表示4个十（40），7表示7个一
- 能用十进制积木展示一个两位数由几个十和几个一组成
- 能指出任意两位数中的十位数字和个位数字
- Explain that in 47, the 4 represents 4 tens (40) and the 7 represents 7 ones
- Use base-ten blocks to show a two-digit number as tens and ones
- Identify the tens digit and ones digit in any two-digit number
评估问题 / Assessment
如果{{name}}看到数字47，能否说出这里有4个十（四十）和7个一，而不是只把数字读成“四七”？
If {{name}} sees the number 47, can they tell you there are 4 tens (forty) and 7 ones — rather than just reading the digits as 'four seven'?