Skip to content

Revision: Numbers 1-20

Mathematics Grade 2 Difficulty 1/5

Beginning of the lesson

πŸ”’ Review: Numbers from 1 to 20

Hello, friend! Today we will review all the numbers from 1 to 20!

1️⃣ Counting from 1 to 20

πŸ”΅ Counting Forward:
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
πŸ”΄ Counting Backward:
20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1
🟒 Even Numbers (every other one):
2, 4, 6, 8, 10, 12, 14, 16, 18, 20 β€” divisible by 2!
🟑 Odd Numbers:
1, 3, 5, 7, 9, 11, 13, 15, 17, 19 β€” not divisible by 2!
Interactive visualization β€” available in the full lesson

2️⃣ Reading and Writing Numbers

Let's learn to read and write numbers correctly!

πŸ“– Numbers from 1 to 10
  • 1 β€” one
  • 2 β€” two
  • 3 β€” three
  • 4 β€” four
  • 5 β€” five
  • 6 β€” six
  • 7 β€” seven
  • 8 β€” eight
  • 9 β€” nine
  • 10 β€” ten
πŸ“– Numbers from 11 to 20
  • 11 β€” eleven
  • 12 β€” twelve
  • 13 β€” thirteen
  • 14 β€” fourteen
  • 15 β€” fifteen
  • 16 β€” sixteen
  • 17 β€” seventeen
  • 18 β€” eighteen
  • 19 β€” nineteen
  • 20 β€” twenty
πŸ’‘ Remember: Numbers from 13 to 19 end with "-teen"!

Continue this lesson on YourAIZone

The full lesson has the complete explanation, worked examples, common mistakes, tests with instant checking and an AI tutor. Start right away as a guest, or create an account to keep your progress.

In the full lesson

  • The complete explanation
  • Worked examples
  • Common mistakes and how to avoid them
  • Test questions: 16
  • AI tutor that answers questions about the topic
  • Progress tracking for students, parents and teachers