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2nd Grade Fix the Mistake Worksheets

50 printable 2nd 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 2: three-digit subtractions already worked, some of them wrong, to check, repair and prove.

Practice pages support a program; they are not the lesson. These sheets reinforce Building Number Sense Grade 2, the sequenced K–5 math series from Faith Thinkers. See every program →

Choose a worksheet below, then open the large preview to zoom.

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.

Fix The Mistake Practice 1 Free Worksheet 1 of 50
Fix The Mistake Practice 2 Free Worksheet 2 of 50
Fix The Mistake Practice 3 Free Worksheet 3 of 50
2nd Grade math worksheet — Fix The Mistake Practice 4
Fix The Mistake Practice 4 All Access
2nd Grade math worksheet — Fix The Mistake Practice 5
Fix The Mistake Practice 5 All Access
2nd Grade math worksheet — Fix The Mistake Practice 6
Fix The Mistake Practice 6 All Access
2nd Grade math worksheet — Fix The Mistake Practice 7
Fix The Mistake Practice 7 All Access
2nd Grade math worksheet — Fix The Mistake Practice 8
Fix The Mistake Practice 8 All Access
2nd Grade math worksheet — Fix The Mistake Practice 9
Fix The Mistake Practice 9 All Access
41 more worksheets and all 50 answer keys
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All 50 worksheets in this set

Fix The Mistake Practice, numbered 1 to 50. The free ones open as PDFs.

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Teaching Fix the Mistake

What it is

Six three-digit subtractions that have already been worked, some right and some wrong. The child marks each one, repairs the wrong ones, proves the repair by adding back, and names where the mistakes came from.

When a child is ready

Ready once three-digit subtraction with borrowing has been taught.

If they struggle

Rework each problem on scrap paper without looking at the printed answer, then compare. Most of the wrong ones forgot to borrow.

This skill in other grades: Kindergarten · Grade 1 · Grade 3 · Grade 4 · Grade 5