多1000或少1000
1000 More or Less
求比一个已知数多1000或少1000的数
Find 1000 more or less than a given number
学习证据 / Evidence
- 已知4562,能说出比它多1000的数是5562,比它少1000的数是3562。
- 能用位值知识解释为什么只有千位上的数字会改变。
- 能将这种方法应用到超过10000的数上。
- Given 4,562, state that 1000 more is 5,562 and 1000 less is 3,562
- Explain using place value that only the thousands digit changes
- Apply this skill to numbers beyond 10,000
评估问题 / Assessment
{{name}}能快速心算出“比3456多1000”或“比7200少1000”,并知道只有千位上的数字会改变吗?
Can {{name}} quickly work out '1,000 more than 3,456' or '1,000 less than 7,200' in their head — knowing only the thousands digit changes?