多步问题：选择运算
Multi-step problems: choosing operations
解决涉及加、减、乘、除的问题，判断并说明应使用哪些运算和方法；在情境中解决多步问题。
Solve problems involving addition, subtraction, multiplication, and division, deciding which operations and methods to use and why; solve multi-step problems in contexts
学习证据 / Evidence
- 解决一个涉及加、减、乘、除四种运算混合的三步应用题。
- 解释在多步问题中每一步为什么选择特定的运算。
- 识别并纠正多步解答中因使用错误运算而出现的错误。
- Solve a three-step word problem involving a mix of all four operations
- Explain why particular operations were chosen for each step of a multi-step problem
- Identify and correct an error in a multi-step solution that used the wrong operation
评估问题 / Assessment
如果给{{name}}一道混合不同运算的多步问题，比如计算几件不同价格商品的总费用，{{name}}能否正确规划并完成每一步？
If {{name}} is given a multi-step problem mixing different operations — like working out the total cost of several items at different prices — can they plan and carry out each step correctly?