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

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One paper per pupil

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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.Priya worked out 57 × 35 = 456. What is the right answer?
2.Jonah worked out 58 × 38 = 638. What is the right answer?
3.Dilan worked out 40 × 86 = 560. What is the right answer?
4.Zara worked out 38 × 84 = 456. What is the right answer?
5.Dilan worked out 54 × 54 = 486. What is the right answer?
6.Priya worked out 27 × 74 = 297. What is the right answer?
7.Zara worked out 91 × 86 = 1274. What is the right answer?
8.Dilan worked out 89 × 42 = 534. What is the right answer?

LessonPrint · 5.NBT.B.5 · Set 1 · free to copy for classroom use

Answer key — Find the Mistake — Two-Digit Multiplication

Set 1. Prints on its own sheet.

  1. 1.1995
  2. 2.2204
  3. 3.3440
  4. 4.3192
  5. 5.2916
  6. 6.1998
  7. 7.7826
  8. 8.3738

Questions about Find the Mistake — Two-Digit Multiplication

What does the Find the Mistake — Two-Digit Multiplication worksheet cover?

It practises catching a tens digit multiplied as if it were ones — 8 questions for Grade 5, all on Common Core 5.NBT.B.5: Multiply large numbers using the standard method. The instruction to pupils is “Find the mistake and write the right answer”, and the answer key follows on the next sheet.

Which Common Core standard does Find the Mistake — Two-Digit Multiplication practise?

CCSS.MATH.CONTENT.5.NBT.B.5 — 5.NBT.B.5, in the Number & Operations in Base Ten domain for Grade 5. The published standard reads: “Fluently multiply multi-digit whole numbers using the standard algorithm.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

Find the Mistake — Two-Digit Multiplication is written for Grade 5, typically ages 10-11. It is one of the sheets on 5.NBT.B.5, so it suits any pupil working at that standard — including older pupils revisiting it and younger ones working ahead.

Does Find the Mistake — Two-Digit Multiplication come with an answer key?

Yes. All 8 answers are generated from the same problems as the questions, so the key cannot drift out of step with the sheet. It starts on a fresh sheet of paper, after the questions, so it is not handed out with the class by accident.

How many different versions of Find the Mistake — Two-Digit Multiplication can I print?

25 — one per pupil, and all 25 ask different questions. Set 1 downloads the whole class as a single PDF. Every version is fixed to its own address, so a sheet printed today holds the same problems when you reopen it next week.

Is Find the Mistake — Two-Digit Multiplication free to print and photocopy?

Yes. Find the Mistake — Two-Digit Multiplication, its answer key and its 25 versions are free to print and photocopy for your own class, with no account, no email capture and no subscription at the download step. Please do not resell them or republish them as your own.

Is there a lesson plan to teach 5.NBT.B.5?

Yes — “Multiplying Multi-Digit Numbers” is a 50-minute Grade 5 plan for 5.NBT.B.5, timed section by section, with the misconceptions to expect and an exit ticket. Find the Mistake — Two-Digit Multiplication is the practice that follows it.

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.