心算与笔算加减法
Mental and written addition and subtraction
运用心算和笔算方法解决加减法问题，包括涉及数字、数量和计量的问题。
Solve addition and subtraction problems using mental and written methods, including problems involving numbers, quantities, and measures
学习证据 / Evidence
- 解决一个两步问题，例如：“我有35便士，花了12便士，然后又找到5便士，现在有多少钱？”
- 针对给定的问题选择合适的方法（心算或笔算）。
- 解决涉及计量的问题，例如：“一条丝带长45厘米，我剪下了18厘米。”
- Solve a two-step problem: 'I had 35p, spent 12p, then found 5p. How much now?'
- Choose an appropriate method (mental or written) for a given problem
- Solve problems involving measures, e.g. 'a ribbon is 45cm, I cut off 18cm'
评估问题 / Assessment
如果{{name}}遇到一个涉及长度、重量或价格的问题，能否判断出该用加法还是减法，并正确完成计算？
If {{name}} is given a problem involving lengths, weights, or prices, can they decide whether to add or subtract and carry out the calculation correctly?