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Number Recognition 11-20

Mathematics Grade 1 Difficulty 2/5

Beginning of the lesson

Numbers 11 to 20

After 10, we count to 20!

Let's learn numbers 11 to 20.

11

eleven

12

twelve

13

thirteen

14

fourteen

15

fifteen

16

sixteen

17

seventeen

18

eighteen

19

nineteen

20

twenty

Important Things to Know:

  • Numbers 11-19 are made of 10 and more.
  • 11 means 10 and 1 more.
  • 12 means 10 and 2 more.
  • 20 means 2 tens.

Let's See Numbers in Groups:

13 is 10 and 3 more

Interactive visualization — available in the full lesson
Interactive visualization — available in the full lesson
Interactive visualization — available in the full lesson

16 is 10 and 6 more

Interactive visualization — available in the full lesson
Interactive visualization — available in the full lesson
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: 47
  • AI tutor that answers questions about the topic
  • Progress tracking for students, parents and teachers