Justifying mathematical reasoning
Mathematics · Mathematical Thinking · meta
Construct and follow multi-step mathematical arguments; identify errors in reasoning and explain why a method works or does not work
What mastery looks like
- Explain step by step why a columnar addition method gives the correct answer
- Find and explain an error in a worked example (e.g. incorrect regrouping)
- Construct a simple argument for why a general statement is true (e.g. 'adding two even numbers always gives an even number')
Check your understanding
If Justifying mathematical reasoning hears another child's explanation for how they solved a maths problem, can Justifying mathematical reasoning say whether the reasoning makes sense — and if not, point out exactly where the logic goes wrong?
Prerequisites
Required first
Helpful