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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 884 · 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. 1.3 + 1 + 8 =
  2. 2.10 + 2 =
  3. 3.10 + 7 =
  4. 4.5 + 1 + 8 =
  5. 5.1 + ? = 6
  6. 6.There are 2 green balloons and 2 blue balloons. How many balloons are there in all?
  7. 7.16 + 1 =
  8. 8.4 + 16 =
  9. 9.? + 2 = 3
  10. 10.3 + 5 + 11 =
  11. 11.There are 2 red kites and 7 blue kites. How many kites are there in all?
  12. 12.Manav has 9 balloons and gets 11 balloons more. How many balloons does Manav have now?
  13. 13.5 + 6 + 9 =
  14. 14.5 + 4 + 4 =
  15. 15.17 + 2 =
  16. 16.There are 6 pink kites and 9 green kites. How many kites are there in all?
  17. 17.Aarav has 12 shells and gets 1 shell more. How many shells does Aarav have now?
  18. 18.2 + ? = 5
  19. 19.Rohan has 13 balloons and gets 5 balloons more. How many balloons does Rohan have now?
  20. 20.2 + ? = 3
  21. 21.? + 4 = 15
  22. 22.4 + 6 =
  23. 23.10 + 3 =
  24. 24.12 + 7 =
  25. 25.Rahul has 14 flowers and gets 1 flower more. How many flowers does Rahul have now?
  26. 26.There are 3 blue beads and 13 red beads. How many beads are there in all?
  27. 27.There are 10 blue balls and 7 red balls. How many balls are there in all?
  28. 28.6 + 8 + 2 =
  29. 29.8 + 1 =
  30. 30.13 + 5 =
  31. 31.? + 5 = 6
  32. 32.10 + ? = 12
  33. 33.Aditya has 13 pencils and gets 5 pencils more. How many pencils does Aditya have now?
  34. 34.Isha has 6 flowers and gets 13 flowers more. How many flowers does Isha have now?
  35. 35.There are 10 blue balls and 4 yellow balls. How many balls are there in all?
  36. 36.? + 10 = 20
  37. 37.4 + 1 =
  38. 38.There are 5 pink flowers and 10 white flowers. How many flowers are there in all?
  39. 39.2 + 14 =
  40. 40.4 + ? = 6

Answer key

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

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