Comparing lengths by measuring · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Comparing lengths by measuring

Mathematics · Measurement · ages 7-8
Name ______________________   Date ____________

  1. A ribbon is 14 cm and a string is 6 cm. How much longer is the ribbon?

    String6Ribbon14
    • 6 cm
    • 8 cm
    • 20 cm

  2. A book is 20 cm wide. A box is 27 cm wide. Which sentence states the difference correctly?

    • The box is 7 cm wider than the book
    • The box is 7 wider than the book
    • The book is 7 cm wider than the box
    • The box is 47 cm wider than the book

  3. A rope is 15 cm long. A string is 9 cm long. How much longer is the rope?

    Answer: ______________

  4. Sam measures a crayon and a pencil. The crayon is 9 cm and the pencil is 16 cm. Which subtraction shows how much longer the pencil is?

    Crayon9Pencil16
    • 9 − 16
    • 16 − 9
    • 16 + 9

  5. A scarf is 32 cm and a belt is 18 cm. Which sentence correctly tells the length difference?

    Belt18Scarf32
    • The scarf is 14 cm longer than the belt
    • The scarf is 50 cm longer than the belt
    • The belt is 14 cm longer than the scarf

  6. A desk is 70 cm tall. A chair is 45 cm tall. How much taller is the desk than the chair?

    Chair45Desk70
    • 20 cm
    • 25 cm
    • 30 cm

  7. A bookshelf is 90 cm tall. A desk is 62 cm tall. How much taller is the bookshelf than the desk?

    • 28 cm taller
    • 152 cm taller
    • 38 cm taller
    • 18 cm taller

  8. A shelf is 45 cm long. A box is 28 cm long. How many centimeters longer is the shelf?

    Box28Shelf45

    Answer: ______________

  9. Omar says the bookshelf is 'bigger' than the desk because it looked taller at a glance. What is missing from his comparison?

    • He needs to weigh both the bookshelf and the desk
    • He needs to count how many books fit on the shelf
    • He needs to measure both and give the difference in a unit like cm

  10. A curtain is 120 cm and a towel is 45 cm. The difference between them is 85 cm.

    Towel45Curtain120

    Circle one:   True   False

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Answer key

For grown-ups. Fold this page away before handing over the rest.

Comparing lengths by measuring W1-mt_xWg0lI_gG4-s1

  1. 8 cm · 14 - 6 = 8, so the ribbon is 8 cm longer.
  2. The box is 7 cm wider than the book · 27 - 20 = 7, and the sentence needs the unit cm and the right direction: the box is 7 cm wider than the book.
  3. 6 · 15 - 9 = 6, so the rope is 6 cm longer.
  4. 16 − 9 · The pencil is the bigger length, so start with 16 and take away 9. 16 − 9 = 7, so the pencil is 7 cm longer.
  5. The scarf is 14 cm longer than the belt · 32 - 18 = 14. The scarf is 14 cm longer, and saying 'longer' with the unit makes the answer clear.
  6. 25 cm · 70 - 45 = 25, so the desk is 25 cm taller than the chair.
  7. 28 cm taller · 90 - 62 = 28, so the bookshelf is 28 cm taller than the desk.
  8. 17 · 45 - 28 = 17. The shelf is 17 cm longer than the box.
  9. He needs to measure both and give the difference in a unit like cm · A glance is not proof. Measuring both in the same unit and subtracting gives an exact answer, like '12 cm taller.'
  10. False · 120 - 45 = 75, not 85. Line up the numbers and subtract carefully to check your work.
Worksheet · LightMySky