1000以内的加减法流利运算
Fluent adding and subtracting within 1000
能够基于位值、运算性质以及加减法之间的关系，运用策略和算法流利地进行1000以内的加法和减法。
Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and the relationship between addition and subtraction
学习证据 / Evidence
- 能运用高效的方法流利地计算两个三位数的加法
- 能流利地进行三位数减法，包括退位减法
- 能根据具体数字选择最有效的计算策略
- Add two three-digit numbers fluently using an efficient method
- Subtract three-digit numbers fluently, including with regrouping
- Choose the most efficient strategy based on the numbers involved
评估问题 / Assessment
{{name}}能否使用对自己最有效的方法，可靠地完成像‘672 − 348’这样的三位数加减法？
Can {{name}} add or subtract three-digit numbers like '672 − 348' reliably, choosing whichever method works best for them?