Mathematics
Multiplication & Division
Procedural
9–10 yrs
Mental multiplication and division (age 9+)
心算乘除法（9岁以上）
Description
Multiply and divide numbers mentally drawing upon known facts, including related facts and place-value adjustments
Mastery Evidence
- Calculate 40 × 60 mentally by using 4 × 6 = 24 then appending zeros
- Derive 7 × 15 by calculating 7 × 10 + 7 × 5
- Calculate 360 ÷ 9 mentally using 36 ÷ 9 = 4
Assessment Prompt
Can your child work out things like '24 × 5' or '360 ÷ 8' in their head — using clever connections to known facts rather than needing to write anything down?
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