4. LOOKING BACK

1. UNDERSTANDING THE PROBLEM
2. DEVISING A PLAN
3. CARRYING OUT THE PLAN
4. ✓LOOKING BACK

Fourth. Examine the solution obtained…. Can you check the result? Can you check the argument?

Can you derive the result differently? Can you see it at a glance?

Can you use the result, or the method, for some other problem?

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