数位值 ×10 与 ÷10
Place Value × 10 and ÷ 10
认识在多位数中，某个数位上的数字表示的值，是它右边相邻数位上同样数字所表示值的10倍，也是它左边相邻数位上同样数字所表示值的1/10。
Recognise that in a multi-digit number, a digit in one place represents 10 times as much as in the place to its right and 1/10 of what it represents in the place to its left
学习证据 / Evidence
- 解释0.04中的4是0.4中4的十分之一
- 表述一个数字向左移动一个数位相当于×10，向右移动一个数位相当于÷10
- 比较6000中的6和0.006中的6所表示的值
- Explain that the 4 in 0.04 is 1/10 of the 4 in 0.4
- State that a digit moving one place left is ×10 and one place right is ÷10
- Compare the value of the 6 in 6,000 and in 0.006
评估问题 / Assessment
{{name}}能解释在4.56中，数字5表示5个十分之一，它是54中数字5所表示值的十分之一，却是0.056中数字5所表示值的10倍吗？
Can {{name}} explain that in 4.56, the digit 5 is worth 5 tenths — ten times less than the 5 in 54, and ten times more than the 5 in 0.056?