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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 20 · 40 sums
TalentJR

The method (Count on): Start with the bigger number. Count on the smaller number, one finger at a time. For a missing number (8 + ? = 15), count on from 8 up to 15, or take away: 15 − 8.

NameDateTime takenScore ___ / 40
  1. 1.There are 2 white balls and 10 blue balls. How many balls are there in all?
  2. 2.10 + ? = 19
  3. 3.There are 5 pink flowers and 8 blue flowers. How many flowers are there in all?
  4. 4.There are 11 green balls and 9 blue balls. How many balls are there in all?
  5. 5.14 + 3 =
  6. 6.5 + 8 + 5 =
  7. 7.12 + 4 =
  8. 8.6 + 3 + 11 =
  9. 9.Kabir has 2 pencils and gets 15 pencils more. How many pencils does Kabir have now?
  10. 10.6 + 5 + 3 =
  11. 11.2 + 7 + 9 =
  12. 12.9 + 3 =
  13. 13.8 + 1 =
  14. 14.13 + 5 =
  15. 15.7 + 1 =
  16. 16.18 + 2 =
  17. 17.There are 12 yellow crayons and 5 pink crayons. How many crayons are there in all?
  18. 18.Zoya has 11 balls and gets 7 balls more. How many balls does Zoya have now?
  19. 19.There are 7 blue flowers and 12 yellow flowers. How many flowers are there in all?
  20. 20.18 + 1 =
  21. 21.? + 2 = 4
  22. 22.10 + 8 =
  23. 23.1 + ? = 5
  24. 24.7 + 1 + 4 =
  25. 25.? + 4 = 10
  26. 26.15 + 5 =
  27. 27.11 + 2 =
  28. 28.There are 10 blue balls and 2 white balls. How many balls are there in all?
  29. 29.Tara has 12 balls and gets 8 balls more. How many balls does Tara have now?
  30. 30.There are 5 green crayons and 14 blue crayons. How many crayons are there in all?
  31. 31.3 + 5 + 1 =
  32. 32.There are 7 white flowers and 6 yellow flowers. How many flowers are there in all?
  33. 33.There are 12 pink crayons and 3 green crayons. How many crayons are there in all?
  34. 34.6 + 7 =
  35. 35.? + 15 = 16
  36. 36.There are 12 pink kites and 3 red kites. How many kites are there in all?
  37. 37.7 + 8 =
  38. 38.There are 2 yellow balloons and 5 pink balloons. How many balloons are there in all?
  39. 39.11 + 9 =
  40. 40.Priya has 5 pencils and gets 10 pencils more. How many pencils does Priya have now?

Answer key

  1. 12
  2. 9
  3. 13
  4. 20
  5. 17
  6. 18
  7. 16
  8. 20
  9. 17
  10. 14
  11. 18
  12. 12
  13. 9
  14. 18
  15. 8
  16. 20
  17. 17
  18. 18
  19. 19
  20. 19
  21. 2
  22. 18
  23. 4
  24. 12
  25. 6
  26. 20
  27. 13
  28. 12
  29. 20
  30. 19
  31. 9
  32. 13
  33. 15
  34. 13
  35. 1
  36. 15
  37. 15
  38. 7
  39. 20
  40. 15

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