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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 913 · 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. 1.2 + 6 + 5 =
  2. 2.6 + 5 + 7 =
  3. 3.There are 4 red balls and 16 green balls. How many balls are there in all?
  4. 4.Rohan has 3 shells and gets 6 shells more. How many shells does Rohan have now?
  5. 5.8 + 3 + 8 =
  6. 6.1 + 7 + 10 =
  7. 7.There are 7 red kites and 8 pink kites. How many kites are there in all?
  8. 8.2 + 8 + 1 =
  9. 9.3 + 4 + 8 =
  10. 10.Isha has 6 shells and gets 13 shells more. How many shells does Isha have now?
  11. 11.There are 8 pink beads and 11 white beads. How many beads are there in all?
  12. 12.1 + ? = 14
  13. 13.8 + 8 + 2 =
  14. 14.10 + 10 =
  15. 15.There are 7 blue kites and 11 yellow kites. How many kites are there in all?
  16. 16.Pooja has 3 balls and gets 2 balls more. How many balls does Pooja have now?
  17. 17.7 + 1 =
  18. 18.2 + 2 =
  19. 19.5 + 2 =
  20. 20.? + 1 = 17
  21. 21.8 + 8 =
  22. 22.18 + 1 =
  23. 23.7 + 8 + 5 =
  24. 24.1 + 13 =
  25. 25.7 + ? = 18
  26. 26.15 + 1 =
  27. 27.Aditya has 2 books and gets 11 books more. How many books does Aditya have now?
  28. 28.4 + 3 =
  29. 29.There are 12 blue flowers and 2 pink flowers. How many flowers are there in all?
  30. 30.5 + 4 + 5 =
  31. 31.? + 1 = 6
  32. 32.? + 10 = 11
  33. 33.Rohan has 14 marbles and gets 6 marbles more. How many marbles does Rohan have now?
  34. 34.1 + 4 + 7 =
  35. 35.16 + 4 =
  36. 36.10 + 5 =
  37. 37.? + 12 = 17
  38. 38.6 + 1 + 2 =
  39. 39.15 + 5 =
  40. 40.? + 2 = 14

Answer key

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

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