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Ordering by length

Putting three things in order from shortest to longest, and comparing two lengths by using a third one in between.

Make a sheetDownload PDFThe PDF has this sheet, its answer key and a guide for grown-ups.

How to help

Line up the left ends and see which reaches furthest. For clues: if A is longer than B and B is longer than C, then A is longer than C too.

Watch for: Comparing things whose left ends don't line up. Picking the name said last in the clues instead of thinking it through. Writing the order from longest to shortest when it asks the other way.

At home: Lay three spoons, shoes or crayons side by side with one end lined up. Ask which is shortest and which is longest.

Sample sheet and answer key

Freddie's Frog Pond

Grade 1 · Ordering by length · 1.MD.A.1

NameDate

Freddie the frog lives in a busy pond full of bugs, lily pads and friends. Solve each problem to help Freddie out!

Shortest to longest

The left ends line up. Write the letters in order.

ABCshortestlongest
ABCshortestlongest
ABCshortestlongest
ABCshortestlongest

Use the clues

Circle the name.

Toby's worm is shorter than Fern's. Fern's is shorter than Freddie's. Whose is longest?FernFreddieToby

Pip's pencil is longer than Fern's. Fern's is longer than Freddie's. Whose is longest?FernPipFreddie

Fern's pencil is shorter than Moss's. Moss's is shorter than Toby's. Whose is longest?TobyFernMoss

Toby's worm is shorter than Moss's. Moss's is shorter than Pip's. Whose is longest?MossPipToby

Mathness! Math Worksheets · © 2026 Zubin KhavarianCode 1MDA1-PO-FIRST at mathness.app
Sheet

Freddie's Frog Pond

Grade 1 · Ordering by length · 1.MD.A.1

Answer key

Freddie the frog lives in a busy pond full of bugs, lily pads and friends. Solve each problem to help Freddie out!

Shortest to longest

The left ends line up. Write the letters in order.

ABCshortestBAClongest
ABCshortestBCAlongest
ABCshortestBCAlongest
ABCshortestBCAlongest

Use the clues

Circle the name.

Toby's worm is shorter than Fern's. Fern's is shorter than Freddie's. Whose is longest?FernFreddieToby

Pip's pencil is longer than Fern's. Fern's is longer than Freddie's. Whose is longest?FernPipFreddie

Fern's pencil is shorter than Moss's. Moss's is shorter than Toby's. Whose is longest?TobyFernMoss

Toby's worm is shorter than Moss's. Moss's is shorter than Pip's. Whose is longest?MossPipToby

Mathness! Math Worksheets · © 2026 Zubin KhavarianCode 1MDA1-PO-FIRST at mathness.appAnswer key
Answer key

New problems every time, three levels (gentle, core and stretch), themes to pick from, a second page if you want one. Each sheet comes with an answer key and a one-page guide for grown-ups.

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Standard

Common Core 1.MD.A.1 · Put three objects in order by length, and compare two lengths using a third.

Also: Maryland 2025 1.GR.A.1 · Florida B.E.S.T. MA.1.M.1.2 · Virginia SOL 1.MG.1

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