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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 689 · 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. 1.6 + 3 + 2 =
  2. 2.There are 3 yellow flowers and 4 white flowers. How many flowers are there in all?
  3. 3.4 + 1 + 5 =
  4. 4.2 + 8 =
  5. 5.? + 3 = 4
  6. 6.? + 9 = 18
  7. 7.4 + 2 + 11 =
  8. 8.1 + 15 =
  9. 9.? + 5 = 7
  10. 10.2 + 7 =
  11. 11.? + 2 = 10
  12. 12.2 + ? = 14
  13. 13.10 + 6 =
  14. 14.? + 3 = 7
  15. 15.2 + 5 + 12 =
  16. 16.8 + 1 + 7 =
  17. 17.1 + 18 =
  18. 18.9 + ? = 15
  19. 19.? + 9 = 13
  20. 20.4 + ? = 14
  21. 21.There are 11 white balloons and 2 pink balloons. How many balloons are there in all?
  22. 22.6 + 8 + 6 =
  23. 23.Farhan has 14 pencils and gets 1 pencil more. How many pencils does Farhan have now?
  24. 24.Kavya has 5 mangoes and gets 3 mangoes more. How many mangoes does Kavya have now?
  25. 25.7 + 12 =
  26. 26.2 + ? = 5
  27. 27.There are 8 yellow kites and 7 red kites. How many kites are there in all?
  28. 28.? + 1 = 14
  29. 29.3 + 4 + 13 =
  30. 30.2 + 3 + 7 =
  31. 31.3 + 7 + 1 =
  32. 32.There are 6 white flowers and 2 yellow flowers. How many flowers are there in all?
  33. 33.There are 10 blue balls and 6 red balls. How many balls are there in all?
  34. 34.13 + 1 =
  35. 35.7 + ? = 16
  36. 36.2 + ? = 9
  37. 37.There are 7 pink balloons and 12 blue balloons. How many balloons are there in all?
  38. 38.5 + 8 =
  39. 39.4 + 16 =
  40. 40.Kavya has 2 kites and gets 17 kites more. How many kites does Kavya have now?

Answer key

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

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