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Dividing by 10, 100, and Other Round Numbers

Mathematics Grade 3 Difficulty 2/5

Beginning of the lesson

➗ Dividing Round Numbers

Learn the Magic of Dividing by 10, 100, and More!

Grade 3 Mathematics

🔵 What Are Round Numbers?

Round numbers are special numbers that end in zero(s). They are easy to work with in mental math!

10 20 30 40 50 100 200 500 1000
💡 Remember: Round numbers always have at least one zero at the end!
Interactive visualization — available in the full lesson
Interactive visualization — available in the full lesson

✂️ What is Dividing Round Numbers?

Dividing round numbers means splitting them into equal groups. We use place value patterns to make division easier!

Example: 60 ÷ 3 = ?

We split 60 into 3 equal groups

20
Group 1
20
Group 2
20
Group 3

60 ÷ 3 = 20

Interactive visualization — available in the full lesson

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In the full lesson

  • The complete explanation
  • Worked examples
  • Common mistakes and how to avoid them
  • Test questions: 26
  • AI tutor that answers questions about the topic
  • Progress tracking for students, parents and teachers