乘法与加法问题
Multiply & Add Problems
解决同时涉及乘法和加法的实际问题，包括运用乘法分配律、整数倍问题和较复杂的搭配问题。
Solve problems involving multiplying and adding, including using the distributive law, integer scaling problems, and harder correspondence problems
学习证据 / Evidence
- 运用乘法分配律，把14 × 6拆成10 × 6 + 4 × 6来计算
- 解决整数倍问题（例如：一座塔的高度是一栋15米高建筑的3倍）
- 解决搭配问题（例如：有3种面包和4种馅料，可以做出多少种不同的三明治？）
- Use the distributive law to solve 14 × 6 as 10 × 6 + 4 × 6
- Solve a scaling problem (e.g. 'A tower is 3 times as tall as a 15 m building')
- Solve a correspondence problem (e.g. '3 types of bread, 4 types of filling — how many different sandwiches?')
评估问题 / Assessment
如果{{name}}要计算‘5 × 23’，能把式子拆成‘5 × 20 + 5 × 3 = 100 + 15 = 115’来计算吗——而不是一上来就直接列竖式？
If {{name}} needs to work out '5 × 23', can they split it into '5 × 20 + 5 × 3 = 100 + 15 = 115' — rather than just jumping straight to a written method?