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Make Ten — Missing Second Number is a free printable Kindergarten maths worksheet on the unknown in the second position, aligned to Common Core standard K.OA.A.4. 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.

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All 25 sets ask different questions.

Make Ten — Missing Second Number

K.OA.A.4

NameDate

Work out each answer.

1.1 + ___ = 8
2.4 + ___ = 9
3.6 + ___ = 13
4.1 + ___ = 4
5.6 + ___ = 7
6.6 + ___ = 15
7.8 + ___ = 16
8.8 + ___ = 12
9.7 + ___ = 10
10.7 + ___ = 12
11.8 + ___ = 10
12.6 + ___ = 11

LessonPrint · K.OA.A.4 · Set 1 · free to copy for classroom use

Answer key — Make Ten — Missing Second Number

Set 1. Prints on its own sheet.

  1. 1.7
  2. 2.5
  3. 3.7
  4. 4.3
  5. 5.1
  6. 6.9
  7. 7.8
  8. 8.4
  9. 9.3
  10. 10.5
  11. 11.2
  12. 12.5

Questions about Make Ten — Missing Second Number

What does the Make Ten — Missing Second Number worksheet cover?

It practises the unknown in the second position — 12 questions for Kindergarten, all on Common Core K.OA.A.4: Find the partner number that makes ten. The instruction to pupils is “Work out each answer”, and the answer key follows on the next sheet.

Which Common Core standard does Make Ten — Missing Second Number practise?

CCSS.MATH.CONTENT.K.OA.A.4 — K.OA.A.4, in the Operations & Algebraic Thinking domain for Kindergarten. The published standard reads: “For any number from 1 to 9, find the number that makes 10 when added to the given number.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

Make Ten — Missing Second Number is written for Kindergarten, typically ages 5-6. It is one of the sheets on K.OA.A.4, so it suits any pupil working at that standard — including older pupils revisiting it and younger ones working ahead.

Does Make Ten — Missing Second 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 Make Ten — Missing Second 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 Make Ten — Missing Second Number free to print and photocopy?

Yes. Make Ten — Missing Second 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.

More practice for K.OA.A.4

Find the partner number that makes ten.

All Kindergarten worksheets

Last reviewed 2026-09-05. Aligned to K.OA.A.4 of the Common Core State Standards for mathematics.