3rd Grade Fix the Mistake Worksheets
50 printable 3rd Grade math worksheets on Fix the Mistake. Every sheet has a worked answer key — 50 in all. The first three worksheets are free to download; All Access opens the rest and every answer key.
In Grade 3: four worked problems, one in each operation, each with a mistake to find, fix and explain.
Practice pages support a program; they are not the lesson. These sheets reinforce Building Number Sense Grade 3, the sequenced K–5 math series from Faith Thinkers. See every program →
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3 of 50 worksheets free · All Access opens the other 47 and all 50 answer keys
The free sheets download from this page as PDFs. Open to everyone.
Included in All Access — $39/month for every child in the household, cancel anytime.
Members can add these sheets to a workbook of their own: My Workbooks.
All 50 worksheets in this set
Fix The Mistake Practice, numbered 1 to 50. The free ones open as PDFs.
Teaching Fix the Mistake
What it is
Four worked problems, one in each operation, each containing a mistake to find, correct and explain in words, then four fresh problems to solve correctly.
When a child is ready
Ready once all four operations have been taught with small numbers.
If they struggle
Follow the checklist on the page: read the problem, check each step, ask whether the answer makes sense. An estimate usually shows the wrong answer at once.
Worksheet preview
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