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Find the Mistake — Two-Digit Multiplication is a free printable Grade 5 maths worksheet on catching a tens digit multiplied as if it were ones, aligned to Common Core standard 5.NBT.B.5. It prints 8 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 25 of 25 · the same problems every time you open this link.

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One paper per pupil

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Find the Mistake — Two-Digit Multiplication

5.NBT.B.5

NameDate

Find the mistake and write the right answer.

1.Kofi worked out 41 × 28 = 410. What is the right answer?
2.Ravi worked out 23 × 21 = 69. What is the right answer?
3.Freya worked out 91 × 34 = 637. What is the right answer?
4.Mei worked out 31 × 24 = 186. What is the right answer?
5.Jonah worked out 79 × 78 = 1185. What is the right answer?
6.Suki worked out 67 × 23 = 335. What is the right answer?
7.Noor worked out 55 × 91 = 550. What is the right answer?
8.Noor worked out 81 × 53 = 648. What is the right answer?

LessonPrint · 5.NBT.B.5 · Set 25 · free to copy for classroom use

Answer key — Find the Mistake — Two-Digit Multiplication

Set 25. Prints on its own sheet.

  1. 1.1148
  2. 2.483
  3. 3.3094
  4. 4.744
  5. 5.6162
  6. 6.1541
  7. 7.5005
  8. 8.4293

More practice for 5.NBT.B.5

Multiply large numbers using the standard method.

Teaching this next? Multiplying Multi-Digit Numbers is the 50-minute plan for it, with the misconceptions to expect.

All Grade 5 worksheets

Last reviewed 2026-09-05. Aligned to 5.NBT.B.5 of the Common Core State Standards for Mathematics.