Mathematics
Multiplication & Division
Conceptual
11–12 yrs
Using inverse operations
使用逆运算
Description
Recognise and use relationships between operations including inverse operations; use these relationships to check answers and simplify calculations
Mastery Evidence
- Use addition and subtraction as inverse operations to check and solve problems
- Use multiplication and division as inverse operations to check and solve problems
- Recognise that squaring and square-rooting are inverse operations
Assessment Prompt
If your child works out '252 ÷ 7 = 36', can they immediately use the inverse to check — '36 × 7 = 252' — without having to redo the division?
