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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 365 · 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 12 pink flowers and 6 blue flowers. How many flowers are there in all?
  2. 2.3 + 1 =
  3. 3.4 + 7 + 9 =
  4. 4.7 + 3 + 9 =
  5. 5.8 + 5 + 1 =
  6. 6.4 + 7 + 5 =
  7. 7.6 + 2 + 4 =
  8. 8.Kabir has 12 laddoos and gets 2 laddoos more. How many laddoos does Kabir have now?
  9. 9.Priya has 9 laddoos and gets 7 laddoos more. How many laddoos does Priya have now?
  10. 10.8 + 5 =
  11. 11.3 + 8 + 4 =
  12. 12.3 + 2 + 7 =
  13. 13.There are 4 yellow balloons and 10 pink balloons. How many balloons are there in all?
  14. 14.Rohan has 15 books and gets 5 books more. How many books does Rohan have now?
  15. 15.8 + ? = 13
  16. 16.8 + 8 + 3 =
  17. 17.12 + 7 =
  18. 18.6 + 1 =
  19. 19.14 + 3 =
  20. 20.There are 10 white balls and 9 red balls. How many balls are there in all?
  21. 21.There are 4 blue flowers and 3 red flowers. How many flowers are there in all?
  22. 22.7 + 1 + 5 =
  23. 23.11 + 1 =
  24. 24.5 + 4 + 1 =
  25. 25.4 + ? = 10
  26. 26.5 + ? = 20
  27. 27.? + 1 = 4
  28. 28.2 + 2 =
  29. 29.There are 3 red flowers and 2 green flowers. How many flowers are there in all?
  30. 30.9 + 4 =
  31. 31.? + 3 = 6
  32. 32.17 + 3 =
  33. 33.1 + 8 + 9 =
  34. 34.18 + 1 =
  35. 35.3 + 6 + 2 =
  36. 36.6 + ? = 9
  37. 37.1 + 8 + 10 =
  38. 38.There are 12 yellow kites and 3 blue kites. How many kites are there in all?
  39. 39.6 + ? = 16
  40. 40.2 + ? = 13

Answer key

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

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