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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 658 · 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 4 blue balls and 14 red balls. How many balls are there in all?
  2. 2.5 + 3 + 2 =
  3. 3.9 + 1 =
  4. 4.13 + 2 =
  5. 5.There are 7 green balloons and 10 red balloons. How many balloons are there in all?
  6. 6.There are 7 blue crayons and 8 green crayons. How many crayons are there in all?
  7. 7.There are 3 pink flowers and 17 red flowers. How many flowers are there in all?
  8. 8.? + 2 = 12
  9. 9.3 + 5 =
  10. 10.There are 12 red balloons and 4 yellow balloons. How many balloons are there in all?
  11. 11.Priya has 8 kites and gets 4 kites more. How many kites does Priya have now?
  12. 12.? + 2 = 10
  13. 13.Dev has 5 balloons and gets 2 balloons more. How many balloons does Dev have now?
  14. 14.1 + ? = 13
  15. 15.19 + 1 =
  16. 16.9 + 6 =
  17. 17.2 + 5 + 12 =
  18. 18.17 + 1 =
  19. 19.12 + 8 =
  20. 20.Zoya has 2 marbles and gets 7 marbles more. How many marbles does Zoya have now?
  21. 21.Rohan has 6 flowers and gets 1 flower more. How many flowers does Rohan have now?
  22. 22.18 + 1 =
  23. 23.12 + ? = 20
  24. 24.17 + 3 =
  25. 25.Arjun has 12 laddoos and gets 5 laddoos more. How many laddoos does Arjun have now?
  26. 26.8 + 7 + 1 =
  27. 27.There are 4 green balloons and 5 yellow balloons. How many balloons are there in all?
  28. 28.6 + 3 + 4 =
  29. 29.1 + 3 + 6 =
  30. 30.8 + 5 =
  31. 31.Diya has 6 shells and gets 10 shells more. How many shells does Diya have now?
  32. 32.Rohan has 5 laddoos and gets 1 laddoo more. How many laddoos does Rohan have now?
  33. 33.There are 6 yellow kites and 12 red kites. How many kites are there in all?
  34. 34.7 + 5 =
  35. 35.15 + 3 =
  36. 36.3 + ? = 4
  37. 37.There are 8 white flowers and 8 yellow flowers. How many flowers are there in all?
  38. 38.Aditya has 9 kites and gets 2 kites more. How many kites does Aditya have now?
  39. 39.? + 8 = 9
  40. 40.Arjun has 14 flowers and gets 4 flowers more. How many flowers does Arjun have now?

Answer key

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

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