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Tens and Ones — Split the Number is a free printable Grade 1 maths worksheet on decomposing a two-digit number, aligned to Common Core standard 1.NBT.B.2. It prints 12 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.

Tens and Ones — Split the Number

1.NBT.B.2

NameDate

Break each number into tens and ones.

1.82 = ___ tens and ___ ones
2.66 = ___ tens and ___ ones
3.25 = ___ tens and ___ ones
4.64 = ___ tens and ___ ones
5.97 = ___ tens and ___ ones
6.40 = ___ tens and ___ ones
7.34 = ___ tens and ___ ones
8.18 = ___ tens and ___ ones
9.39 = ___ tens and ___ ones
10.49 = ___ tens and ___ ones
11.81 = ___ tens and ___ ones
12.47 = ___ tens and ___ ones

LessonPrint · 1.NBT.B.2 · Set 1 · free to copy for classroom use

Answer key — Tens and Ones — Split the Number

Set 1. Prints on its own sheet.

  1. 1.8 and 2
  2. 2.6 and 6
  3. 3.2 and 5
  4. 4.6 and 4
  5. 5.9 and 7
  6. 6.4 and 0
  7. 7.3 and 4
  8. 8.1 and 8
  9. 9.3 and 9
  10. 10.4 and 9
  11. 11.8 and 1
  12. 12.4 and 7

Questions about Tens and Ones — Split the Number

What does the Tens and Ones — Split the Number worksheet cover?

It practises decomposing a two-digit number — 12 questions for Grade 1, all on Common Core 1.NBT.B.2: Know that in 47, the 4 means four tens and the 7 means seven ones. The instruction to pupils is “Break each number into tens and ones”, and the answer key follows on the next sheet.

Which Common Core standard does Tens and Ones — Split the Number practise?

CCSS.MATH.CONTENT.1.NBT.B.2 — 1.NBT.B.2, in the Number & Operations in Base Ten domain for Grade 1. The published standard reads: “Understand that the two digits of a two-digit number represent amounts of tens and ones.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

Tens and Ones — Split the Number is written for Grade 1, typically ages 6-7. It is one of the sheets on 1.NBT.B.2, so it suits any pupil working at that standard — including older pupils revisiting it and younger ones working ahead.

Does Tens and Ones — Split the Number come with an answer key?

Yes. All 12 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 Tens and Ones — Split the Number 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 Tens and Ones — Split the Number free to print and photocopy?

Yes. Tens and Ones — Split the Number, 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 1.NBT.B.2?

Yes — “Tens and Ones: What Each Digit Means” is a 40-minute Grade 1 plan for 1.NBT.B.2, timed section by section, with the misconceptions to expect and an exit ticket. Tens and Ones — Split the Number is the practice that follows it.

More practice for 1.NBT.B.2

Know that in 47, the 4 means four tens and the 7 means seven ones.

Teaching this next? Tens and Ones: What Each Digit Means is the 40-minute plan for it, with the misconceptions to expect.

All Grade 1 worksheets

Last reviewed 2026-09-05. Aligned to 1.NBT.B.2 of the Common Core State Standards for mathematics.