除以10和100
Dividing by 10 and 100
理解一位数或两位数除以10和100时的变化，能识别出各个数字在个位、十分位和百分位上的值。
Find the effect of dividing a one- or two-digit number by 10 and 100, identifying the value of the digits as ones, tenths, and hundredths
学习证据 / Evidence
- 计算37 ÷ 10 = 3.7，并指出3在个位上表示3个一，7在十分位上表示7个十分之一。
- 计算4 ÷ 100 = 0.04，并指出4在百分位上表示4个百分之一。
- 解释除以10就是把每一位数字向右移动一个数位。
- Calculate 37 ÷ 10 = 3.7 and identify 3 as ones and 7 as tenths
- Calculate 4 ÷ 100 = 0.04 and identify 4 as hundredths
- Explain that dividing by 10 shifts each digit one place to the right
评估问题 / Assessment
如果{{name}}从数字48开始，将其除以10，能说出答案并解释每个数字的数位发生了什么变化吗？
If {{name}} starts with the number 48 and divides it by 10, can they tell you the answer — and explain what happened to each digit's place value?