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FREE CLASSROOM IMAGES · ROMAN NUMERALS

400 in Roman numerals: CD

400 in Roman numerals is CD. See the conversion explained and download a free CD number card for classroom slides and teaching materials.

White number card with CD in large navy letters, 400 below it, and the Roman numeral parts CD.
Original TeachVee diagram · 1600 × 1000 pixels

UNDERSTAND THE IMAGE

400 = CD

CD represents 400. CD use the subtraction rule because a smaller symbol comes before a larger one. Together, the value is 400.

Try it in class

  • Cover 400 on the card and ask learners to read CD.
  • Explain the conversion: CD represents 400. CD use the subtraction rule because a smaller symbol comes before a larger one. Together, the value is 400.
  • Compare two number cards. Which represents the larger number, and how can you tell?

One image, plenty of uses

This is a diagram, not a completed worksheet. Insert the PNG into a slide, resize it in a document, or print it as a teaching visual. Use it in your classroom materials and review it for your learners before use.

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