图形规律（7岁及以上）
Shape patterns (age 7+)
发现并运用数学结构：将数位规律应用于三位数运算，利用乘除关系，并借助图形特征进行分类。
Look for and use mathematical structure: apply place-value patterns to three-digit operations, use multiplication/division relationships, and exploit shape properties to classify
学习证据 / Evidence
- 利用数位结构解释为什么加整百只改变百位上的数字。
- 运用乘法交换律以及乘除关系来推导未知的算式结果。
- 根据图形结构特征（边数、直角、平行线）对图形进行分类。
- Use the structure of place value to explain why adding hundreds only changes the hundreds digit
- Use commutativity and the relationship between multiplication and division to derive unknown facts
- Classify shapes by their structural properties (number of sides, right angles, parallel lines)
评估问题 / Assessment
当{{name}}进行乘法运算或处理较大的数字时，会不会利用已知的数位或数字关系来简化计算，比如把24×3拆成20×3+4×3？
When {{name}} is multiplying or working with larger numbers, do they use what they know about place value or number relationships to simplify the calculation — like breaking 24 × 3 into 20 × 3 + 4 × 3?