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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 404 · 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.? + 9 = 20
  2. 2.Aarav has 14 flowers and gets 5 flowers more. How many flowers does Aarav have now?
  3. 3.3 + 1 + 1 =
  4. 4.1 + 7 + 3 =
  5. 5.There are 9 pink balls and 11 yellow balls. How many balls are there in all?
  6. 6.19 + 1 =
  7. 7.There are 3 blue balloons and 3 red balloons. How many balloons are there in all?
  8. 8.There are 8 pink flowers and 5 green flowers. How many flowers are there in all?
  9. 9.? + 1 = 17
  10. 10.Riya has 11 bananas and gets 5 bananas more. How many bananas does Riya have now?
  11. 11.2 + 3 + 3 =
  12. 12.7 + 5 + 3 =
  13. 13.8 + 6 + 4 =
  14. 14.4 + ? = 13
  15. 15.18 + 2 =
  16. 16.Zoya has 10 books and gets 8 books more. How many books does Zoya have now?
  17. 17.7 + 9 =
  18. 18.Diya has 3 balls and gets 4 balls more. How many balls does Diya have now?
  19. 19.Rahul has 6 laddoos and gets 5 laddoos more. How many laddoos does Rahul have now?
  20. 20.8 + 4 + 8 =
  21. 21.? + 4 = 6
  22. 22.13 + 5 =
  23. 23.There are 2 red flowers and 4 white flowers. How many flowers are there in all?
  24. 24.Tara has 10 crayons and gets 6 crayons more. How many crayons does Tara have now?
  25. 25.Aarav has 14 balloons and gets 1 balloon more. How many balloons does Aarav have now?
  26. 26.Farhan has 5 kites and gets 12 kites more. How many kites does Farhan have now?
  27. 27.3 + ? = 10
  28. 28.11 + ? = 16
  29. 29.? + 10 = 14
  30. 30.Kabir has 2 mangoes and gets 15 mangoes more. How many mangoes does Kabir have now?
  31. 31.2 + 4 + 5 =
  32. 32.Saanvi has 15 crayons and gets 2 crayons more. How many crayons does Saanvi have now?
  33. 33.? + 7 = 8
  34. 34.There are 11 white balloons and 5 blue balloons. How many balloons are there in all?
  35. 35.3 + 8 + 1 =
  36. 36.2 + 5 + 12 =
  37. 37.2 + ? = 9
  38. 38.1 + 19 =
  39. 39.12 + 6 =
  40. 40.There are 11 pink balloons and 2 red balloons. How many balloons are there in all?

Answer key

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

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