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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 572 · 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. 1.10 + ? = 19
  2. 2.There are 10 blue crayons and 10 yellow crayons. How many crayons are there in all?
  3. 3.7 + 5 + 7 =
  4. 4.5 + 7 + 3 =
  5. 5.Ishaan has 2 flowers and gets 14 flowers more. How many flowers does Ishaan have now?
  6. 6.5 + 15 =
  7. 7.1 + ? = 7
  8. 8.There are 8 yellow kites and 4 blue kites. How many kites are there in all?
  9. 9.9 + 8 =
  10. 10.12 + 4 =
  11. 11.7 + 3 + 3 =
  12. 12.Manav has 10 shells and gets 1 shell more. How many shells does Manav have now?
  13. 13.3 + 7 =
  14. 14.1 + ? = 3
  15. 15.? + 10 = 18
  16. 16.2 + 1 =
  17. 17.There are 8 blue kites and 9 red kites. How many kites are there in all?
  18. 18.2 + ? = 5
  19. 19.Pooja has 5 marbles and gets 5 marbles more. How many marbles does Pooja have now?
  20. 20.1 + 3 + 15 =
  21. 21.3 + 7 + 2 =
  22. 22.5 + ? = 7
  23. 23.4 + 7 + 3 =
  24. 24.6 + 3 + 6 =
  25. 25.There are 8 red kites and 6 blue kites. How many kites are there in all?
  26. 26.3 + 5 =
  27. 27.1 + 2 + 13 =
  28. 28.4 + 11 =
  29. 29.Rohan has 15 laddoos and gets 1 laddoo more. How many laddoos does Rohan have now?
  30. 30.Pooja has 6 shells and gets 11 shells more. How many shells does Pooja have now?
  31. 31.There are 3 white balls and 16 pink balls. How many balls are there in all?
  32. 32.7 + 1 + 2 =
  33. 33.6 + ? = 13
  34. 34.There are 3 green beads and 10 yellow beads. How many beads are there in all?
  35. 35.7 + 6 + 3 =
  36. 36.Aditya has 5 bananas and gets 7 bananas more. How many bananas does Aditya have now?
  37. 37.5 + 10 =
  38. 38.? + 3 = 10
  39. 39.11 + 1 =
  40. 40.? + 10 = 12

Answer key

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

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