Counting 1 To 20 — Set 21

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medium Set 21
  1. What is the next number in the sequence? 6, 9, __, 15, 18
  2. What is the next number in the sequence? 10, 12, 14, __, 18
  3. What comes after 0?
  4. Count by 2s: 6, 8, 10, 12, __
  5. What comes after 1?
  6. Count by 10s: 10, 20, 30, 40, __
  7. What is the next number in the sequence? 3, 6, 9, __, 15
  8. Count the hearts: How many are there? (14 hearts)
  9. Count the apples: How many are there? (19 apples)
  10. Count the circles: How many are there? (7 circles)
  11. What is the next number in the sequence? 6, 9, 12, __, 18
  12. What is the next number in the sequence? 10, 20, __, 40, 50
  13. What comes after 5?
  14. What comes after 11?
  15. Count by 5s: 0, 5, 10, 15, __
  16. Count by 2s: 0, 2, 4, 6, __
  17. What comes after 19?
  18. Count the triangles: How many are there? (3 triangles)

Practice counting 1 to 20 with free printable worksheets. Uniquely generated — reinforce key math skills with every set.

Frequently Asked Questions

How do I use this Counting 1 To 20 Worksheets worksheet?

Print the worksheet and complete the problems. Each set number generates a unique arrangement. Use the same set number for all students in a class for consistent assessment.

Is there an answer key?

Yes — every worksheet includes a complete answer key. Print it separately or view it on screen.

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