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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 540 · 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 7 blue balloons and 4 red balloons. How many balloons are there in all?
  2. 2.3 + ? = 9
  3. 3.11 + 5 =
  4. 4.Saanvi has 15 kites and gets 1 kite more. How many kites does Saanvi have now?
  5. 5.12 + 6 =
  6. 6.5 + 2 + 3 =
  7. 7.Kabir has 12 marbles and gets 7 marbles more. How many marbles does Kabir have now?
  8. 8.There are 8 red balloons and 7 white balloons. How many balloons are there in all?
  9. 9.4 + 1 + 6 =
  10. 10.2 + 6 + 6 =
  11. 11.There are 5 blue balloons and 5 yellow balloons. How many balloons are there in all?
  12. 12.12 + 8 =
  13. 13.16 + 1 =
  14. 14.Rohan has 5 pencils and gets 14 pencils more. How many pencils does Rohan have now?
  15. 15.There are 8 red flowers and 9 pink flowers. How many flowers are there in all?
  16. 16.? + 9 = 13
  17. 17.? + 3 = 11
  18. 18.Arjun has 12 crayons and gets 4 crayons more. How many crayons does Arjun have now?
  19. 19.? + 2 = 8
  20. 20.4 + 4 + 9 =
  21. 21.There are 12 yellow crayons and 4 pink crayons. How many crayons are there in all?
  22. 22.Aarav has 14 laddoos and gets 2 laddoos more. How many laddoos does Aarav have now?
  23. 23.Lakshmi has 8 crayons and gets 11 crayons more. How many crayons does Lakshmi have now?
  24. 24.15 + 1 =
  25. 25.Arjun has 12 books and gets 5 books more. How many books does Arjun have now?
  26. 26.There are 3 blue balls and 17 green balls. How many balls are there in all?
  27. 27.There are 2 green flowers and 15 white flowers. How many flowers are there in all?
  28. 28.? + 3 = 7
  29. 29.3 + ? = 7
  30. 30.7 + 3 =
  31. 31.Riya has 7 marbles and gets 2 marbles more. How many marbles does Riya have now?
  32. 32.4 + ? = 6
  33. 33.17 + 3 =
  34. 34.17 + 1 =
  35. 35.There are 5 red balloons and 9 white balloons. How many balloons are there in all?
  36. 36.? + 10 = 11
  37. 37.8 + 3 + 9 =
  38. 38.7 + 6 + 3 =
  39. 39.3 + 2 + 7 =
  40. 40.? + 7 = 11

Answer key

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

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