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Order Three Lengths is a free printable Grade 1 maths worksheet on ordering by length, aligned to Common Core standard 1.MD.A.1. 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.

Order Three Lengths

1.MD.A.1

NameDate

Write the missing numbers.

1.142022
2.131721
3.111519
4.121820
5.192127
6.152123
7.121620
8.4612

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

Answer key — Order Three Lengths

Set 1. Prints on its own sheet.

  1. 1.16, 18
  2. 2.15, 19
  3. 3.13, 17
  4. 4.14, 16
  5. 5.23, 25
  6. 6.17, 19
  7. 7.14, 18
  8. 8.8, 10

Questions about Order Three Lengths

What does the Order Three Lengths worksheet cover?

It practises ordering by length — 8 questions for Grade 1, all on Common Core 1.MD.A.1: Put objects in order from shortest to longest. The instruction to pupils is “Write the missing numbers”, and the answer key follows on the next sheet.

Which Common Core standard does Order Three Lengths practise?

CCSS.MATH.CONTENT.1.MD.A.1 — 1.MD.A.1, in the Measurement & Data domain for Grade 1. The published standard reads: “Order three objects by length; compare the lengths of two objects indirectly by using a third object.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

Order Three Lengths is written for Grade 1, typically ages 6-7. It is one of the sheets on 1.MD.A.1, so it suits any pupil working at that standard — including older pupils revisiting it and younger ones working ahead.

Does Order Three Lengths 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 Order Three Lengths 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 Order Three Lengths free to print and photocopy?

Yes. Order Three Lengths, 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.MD.A.1?

Yes — “Ordering Objects by Length” is a 40-minute Grade 1 plan for 1.MD.A.1, timed section by section, with the misconceptions to expect and an exit ticket. Order Three Lengths is the practice that follows it.

More practice for 1.MD.A.1

Put objects in order from shortest to longest.

Teaching this next? Ordering Objects by Length is the 40-minute plan for it, with the misconceptions to expect.

All Grade 1 worksheets

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