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Add a Multiple of Ten is a free printable Grade 1 maths worksheet on adding whole tens, aligned to Common Core standard 1.NBT.C.4. It prints 14 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.

Add a Multiple of Ten

1.NBT.C.4

NameDate

Work out each answer.

1.65 + 60 =
2.21 + 50 =
3.58 + 60 =
4.25 + 70 =
5.16 + 20 =
6.38 + 10 =
7.26 + 10 =
8.21 + 80 =
9.34 + 60 =
10.28 + 70 =
11.50 + 60 =
12.33 + 10 =
13.59 + 80 =
14.65 + 20 =

LessonPrint · 1.NBT.C.4 · Set 1 · free to copy for classroom use

Answer key — Add a Multiple of Ten

Set 1. Prints on its own sheet.

  1. 1.125
  2. 2.71
  3. 3.118
  4. 4.95
  5. 5.36
  6. 6.48
  7. 7.36
  8. 8.101
  9. 9.94
  10. 10.98
  11. 11.110
  12. 12.43
  13. 13.139
  14. 14.85

Questions about Add a Multiple of Ten

What does the Add a Multiple of Ten worksheet cover?

It practises adding whole tens — 14 questions for Grade 1, all on Common Core 1.NBT.C.4: Add numbers up to 100. The instruction to pupils is “Work out each answer”, and the answer key follows on the next sheet.

Which Common Core standard does Add a Multiple of Ten practise?

CCSS.MATH.CONTENT.1.NBT.C.4 — 1.NBT.C.4, in the Number & Operations in Base Ten domain for Grade 1. The published standard reads: “Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

Add a Multiple of Ten is written for Grade 1, typically ages 6-7. It is one of the sheets on 1.NBT.C.4, so it suits any pupil working at that standard — including older pupils revisiting it and younger ones working ahead.

Does Add a Multiple of Ten come with an answer key?

Yes. All 14 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 Add a Multiple of Ten 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 Add a Multiple of Ten free to print and photocopy?

Yes. Add a Multiple of Ten, 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 1.NBT.C.4

Add numbers up to 100.

All Grade 1 worksheets

Last reviewed 2026-09-05. Aligned to 1.NBT.C.4 of the Common Core State Standards for mathematics.