多10或少10、多100或少100
10 or 100 More or Less
对于不超过1000的给定数，能找出比它多10、少10、多100或少100的数。
Find 10 or 100 more or less than a given number up to 1000
学习证据 / Evidence
- 给出一个三位数，能说出比它多10和少10的数。
- 给出一个三位数，能说出比它多100和少100的数。
- 能运用数位理解解释策略（例如：只有十位或百位上的数字发生变化）。
- Given a three-digit number, state what is 10 more and 10 less
- Given a three-digit number, state what is 100 more and 100 less
- Explain the strategy using place-value understanding (e.g. only the tens/hundreds digit changes)
评估问题 / Assessment
{{name}}能快速在脑中算出“比342多10”或“比875少100”是多少，并知道哪个数位变了、哪个数位保持不变吗？
Can {{name}} quickly work out '10 more than 342' or '100 less than 875' in their head — knowing which digit changes and which stays the same?