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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 819 · 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 + 5 =
  2. 2.12 + 8 =
  3. 3.7 + 2 + 9 =
  4. 4.? + 2 = 4
  5. 5.? + 3 = 19
  6. 6.6 + 14 =
  7. 7.There are 11 pink kites and 6 red kites. How many kites are there in all?
  8. 8.7 + 6 + 3 =
  9. 9.5 + 6 + 2 =
  10. 10.9 + ? = 11
  11. 11.Riya has 15 shells and gets 5 shells more. How many shells does Riya have now?
  12. 12.1 + 1 + 9 =
  13. 13.2 + 3 + 14 =
  14. 14.There are 7 white balls and 12 pink balls. How many balls are there in all?
  15. 15.8 + 5 =
  16. 16.18 + 1 =
  17. 17.4 + 6 + 2 =
  18. 18.Farhan has 5 crayons and gets 7 crayons more. How many crayons does Farhan have now?
  19. 19.8 + 3 =
  20. 20.8 + 10 =
  21. 21.7 + 1 + 8 =
  22. 22.7 + 13 =
  23. 23.11 + 6 =
  24. 24.16 + 2 =
  25. 25.18 + 2 =
  26. 26.Arjun has 9 kites and gets 5 kites more. How many kites does Arjun have now?
  27. 27.Nisha has 10 mangoes and gets 7 mangoes more. How many mangoes does Nisha have now?
  28. 28.There are 9 pink balloons and 2 blue balloons. How many balloons are there in all?
  29. 29.Kavya has 3 kites and gets 15 kites more. How many kites does Kavya have now?
  30. 30.2 + 7 + 8 =
  31. 31.There are 6 green kites and 11 white kites. How many kites are there in all?
  32. 32.5 + 7 =
  33. 33.3 + 6 + 6 =
  34. 34.13 + 4 =
  35. 35.6 + 4 + 4 =
  36. 36.6 + 13 =
  37. 37.14 + ? = 16
  38. 38.Arjun has 2 flowers and gets 12 flowers more. How many flowers does Arjun have now?
  39. 39.? + 1 = 3
  40. 40.There are 3 pink balloons and 16 green balloons. How many balloons are there in all?

Answer key

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

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