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How Many More? Within 20 is a free printable Grade 1 maths worksheet on compare problems, where nothing changes hands, aligned to Common Core standard 1.OA.A.1. It prints 6 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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All 25 sets ask different questions.

How Many More? Within 20

1.OA.A.1

NameDate

Read carefully, then work out the answer.

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

Answer key — How Many More? Within 20

Set 1. Prints on its own sheet.

  1. 1.15
  2. 2.5
  3. 3.11
  4. 4.8
  5. 5.7
  6. 6.4

Questions about How Many More? Within 20

What does the How Many More? Within 20 worksheet cover?

It practises compare problems, where nothing changes hands — 6 questions for Grade 1, all on Common Core 1.OA.A.1: Solve story problems with adding and subtracting up to 20. The instruction to pupils is “Read carefully, then work out the answer”, and the answer key follows on the next sheet.

Which Common Core standard does How Many More? Within 20 practise?

CCSS.MATH.CONTENT.1.OA.A.1 — 1.OA.A.1, in the Operations & Algebraic Thinking domain for Grade 1. The published standard reads: “Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

How Many More? Within 20 is written for Grade 1, typically ages 6-7. It is one of the sheets on 1.OA.A.1, so it suits any pupil working at that standard — including older pupils revisiting it and younger ones working ahead.

Does How Many More? Within 20 come with an answer key?

Yes. All 6 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 How Many More? Within 20 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 How Many More? Within 20 free to print and photocopy?

Yes. How Many More? Within 20, 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.OA.A.1

Solve story problems with adding and subtracting up to 20.

All Grade 1 worksheets

Last reviewed 2026-09-05. Aligned to 1.OA.A.1 of the Common Core State Standards for mathematics.