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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 529 · 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 + 3 =
  2. 2.17 + 1 =
  3. 3.Nisha has 6 laddoos and gets 2 laddoos more. How many laddoos does Nisha have now?
  4. 4.8 + 2 + 9 =
  5. 5.3 + 5 =
  6. 6.13 + ? = 14
  7. 7.Aarav has 14 marbles and gets 3 marbles more. How many marbles does Aarav have now?
  8. 8.6 + ? = 16
  9. 9.10 + 1 =
  10. 10.Ananya has 8 balloons and gets 10 balloons more. How many balloons does Ananya have now?
  11. 11.? + 4 = 7
  12. 12.8 + 2 + 5 =
  13. 13.5 + ? = 18
  14. 14.There are 9 green beads and 10 red beads. How many beads are there in all?
  15. 15.? + 11 = 14
  16. 16.There are 4 yellow balls and 7 pink balls. How many balls are there in all?
  17. 17.There are 10 red beads and 7 pink beads. How many beads are there in all?
  18. 18.7 + 4 + 2 =
  19. 19.7 + 5 + 2 =
  20. 20.? + 12 = 16
  21. 21.Priya has 13 books and gets 7 books more. How many books does Priya have now?
  22. 22.There are 11 green crayons and 9 red crayons. How many crayons are there in all?
  23. 23.? + 3 = 8
  24. 24.Arjun has 11 marbles and gets 1 marble more. How many marbles does Arjun have now?
  25. 25.4 + 3 + 13 =
  26. 26.1 + 4 + 14 =
  27. 27.9 + ? = 18
  28. 28.There are 3 blue balls and 7 green balls. How many balls are there in all?
  29. 29.? + 5 = 6
  30. 30.4 + 5 + 11 =
  31. 31.5 + 8 + 7 =
  32. 32.Farhan has 8 pencils and gets 4 pencils more. How many pencils does Farhan have now?
  33. 33.? + 1 = 9
  34. 34.7 + 5 + 8 =
  35. 35.There are 5 yellow kites and 12 green kites. How many kites are there in all?
  36. 36.5 + 2 + 13 =
  37. 37.? + 1 = 5
  38. 38.5 + ? = 6
  39. 39.2 + 1 + 3 =
  40. 40.16 + 2 =

Answer key

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

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