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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 441 · 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.Rohan has 4 marbles and gets 6 marbles more. How many marbles does Rohan have now?
  2. 2.Sneha has 8 balls and gets 1 ball more. How many balls does Sneha have now?
  3. 3.There are 4 yellow balls and 14 blue balls. How many balls are there in all?
  4. 4.11 + ? = 15
  5. 5.Saanvi has 11 books and gets 2 books more. How many books does Saanvi have now?
  6. 6.13 + ? = 18
  7. 7.Zoya has 9 pencils and gets 1 pencil more. How many pencils does Zoya have now?
  8. 8.3 + 8 + 3 =
  9. 9.6 + 13 =
  10. 10.2 + ? = 3
  11. 11.4 + 1 + 15 =
  12. 12.9 + 1 =
  13. 13.There are 6 green flowers and 10 pink flowers. How many flowers are there in all?
  14. 14.5 + 8 + 3 =
  15. 15.There are 8 blue flowers and 3 white flowers. How many flowers are there in all?
  16. 16.6 + 1 + 1 =
  17. 17.Manav has 11 mangoes and gets 9 mangoes more. How many mangoes does Manav have now?
  18. 18.3 + 3 =
  19. 19.? + 10 = 14
  20. 20.? + 1 = 8
  21. 21.3 + ? = 5
  22. 22.Saanvi has 8 marbles and gets 7 marbles more. How many marbles does Saanvi have now?
  23. 23.Manav has 13 balloons and gets 2 balloons more. How many balloons does Manav have now?
  24. 24.Ishaan has 12 crayons and gets 3 crayons more. How many crayons does Ishaan have now?
  25. 25.Tara has 3 books and gets 10 books more. How many books does Tara have now?
  26. 26.? + 3 = 4
  27. 27.Ananya has 14 balls and gets 2 balls more. How many balls does Ananya have now?
  28. 28.Vivaan has 2 crayons and gets 5 crayons more. How many crayons does Vivaan have now?
  29. 29.3 + 5 + 4 =
  30. 30.There are 4 pink balls and 3 red balls. How many balls are there in all?
  31. 31.6 + 1 + 10 =
  32. 32.6 + 7 + 1 =
  33. 33.1 + 11 =
  34. 34.Pooja has 6 mangoes and gets 2 mangoes more. How many mangoes does Pooja have now?
  35. 35.Ananya has 9 mangoes and gets 2 mangoes more. How many mangoes does Ananya have now?
  36. 36.There are 3 white kites and 10 red kites. How many kites are there in all?
  37. 37.Nisha has 6 laddoos and gets 8 laddoos more. How many laddoos does Nisha have now?
  38. 38.There are 10 red balloons and 7 blue balloons. How many balloons are there in all?
  39. 39.? + 1 = 6
  40. 40.2 + 7 + 9 =

Answer key

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

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