加减法（7岁及以上）
Adding and subtracting (age 7+)
运用竖式加减法的标准书面写法，对不超过三位数的数进行加法和减法运算。
Add and subtract numbers with up to three digits using formal written methods of columnar addition and subtraction
学习证据 / Evidence
- 能正确列出竖式加法，并按数位对齐数字
- 能进行竖式减法，并在需要时进行退位（借位）
- 能通过逆运算或估算来检查答案
- Set out a columnar addition correctly with digits aligned by place value
- Carry out columnar subtraction with exchange (borrowing) when needed
- Check the answer using the inverse operation or estimation
评估问题 / Assessment
{{name}}能否将像'347 + 265'或'512 − 278'这样的算式列成竖式，并逐步计算，在需要时进行进位或退位？
Can {{name}} set out a sum like '347 + 265' or '512 − 278' in columns and work through it step by step, carrying or borrowing where needed?