Mathematics
Mathematical Thinking
Meta
9–10 yrs
Understanding fractions (age 9+)
理解分数（9岁以上）
Description
Construct and present logical mathematical arguments involving multiple steps; critique others' reasoning about fractions, angles, or calculations and clearly explain errors or alternative methods
Mastery Evidence
- Prove that 3/4 > 2/3 using a common denominator argument and a visual model
- Find and explain an error in a long multiplication where a partial product was misaligned
- Present a chain of reasoning to show that angles in a triangle sum to 180° by tearing and arranging
Assessment Prompt
If your child and a classmate solve the same maths problem differently, can your child compare the two approaches, explain which method is more efficient, and identify any errors in either working?
