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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 825 · 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. 1.5 + 9 =
  2. 2.1 + 2 + 5 =
  3. 3.8 + 8 + 2 =
  4. 4.Priya has 10 laddoos and gets 3 laddoos more. How many laddoos does Priya have now?
  5. 5.7 + 1 + 6 =
  6. 6.8 + ? = 9
  7. 7.There are 7 red kites and 2 yellow kites. How many kites are there in all?
  8. 8.8 + ? = 16
  9. 9.? + 4 = 6
  10. 10.18 + 2 =
  11. 11.Sneha has 3 mangoes and gets 3 mangoes more. How many mangoes does Sneha have now?
  12. 12.There are 9 yellow balls and 5 blue balls. How many balls are there in all?
  13. 13.1 + 9 =
  14. 14.9 + ? = 13
  15. 15.? + 13 = 15
  16. 16.Joseph has 6 flowers and gets 5 flowers more. How many flowers does Joseph have now?
  17. 17.8 + 12 =
  18. 18.There are 11 pink crayons and 9 green crayons. How many crayons are there in all?
  19. 19.8 + 2 + 6 =
  20. 20.2 + 12 =
  21. 21.1 + 2 + 2 =
  22. 22.6 + 8 + 5 =
  23. 23.1 + 3 + 11 =
  24. 24.Riya has 2 marbles and gets 8 marbles more. How many marbles does Riya have now?
  25. 25.1 + 1 =
  26. 26.7 + 3 + 1 =
  27. 27.4 + 4 =
  28. 28.6 + 3 + 6 =
  29. 29.13 + 1 =
  30. 30.There are 4 blue balloons and 12 green balloons. How many balloons are there in all?
  31. 31.12 + 3 =
  32. 32.3 + 5 + 6 =
  33. 33.15 + 1 =
  34. 34.? + 9 = 10
  35. 35.Ishaan has 15 shells and gets 4 shells more. How many shells does Ishaan have now?
  36. 36.1 + ? = 4
  37. 37.3 + ? = 5
  38. 38.3 + 5 + 1 =
  39. 39.9 + 1 =
  40. 40.Arjun has 13 marbles and gets 3 marbles more. How many marbles does Arjun have now?

Answer key

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

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