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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 583 · 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. 1.1 + ? = 3
  2. 2.8 + 7 =
  3. 3.? + 10 = 19
  4. 4.16 + 2 =
  5. 5.9 + 3 =
  6. 6.7 + 6 =
  7. 7.7 + 1 + 11 =
  8. 8.5 + 1 + 3 =
  9. 9.Karan has 11 laddoos and gets 9 laddoos more. How many laddoos does Karan have now?
  10. 10.2 + 1 + 9 =
  11. 11.17 + 2 =
  12. 12.There are 11 blue balls and 5 red balls. How many balls are there in all?
  13. 13.? + 6 = 10
  14. 14.11 + 8 =
  15. 15.? + 6 = 7
  16. 16.10 + 3 =
  17. 17.Dev has 2 marbles and gets 15 marbles more. How many marbles does Dev have now?
  18. 18.There are 7 red balloons and 7 blue balloons. How many balloons are there in all?
  19. 19.4 + ? = 6
  20. 20.7 + ? = 13
  21. 21.3 + 5 + 6 =
  22. 22.1 + 4 + 4 =
  23. 23.2 + 3 + 3 =
  24. 24.Arjun has 4 balls and gets 6 balls more. How many balls does Arjun have now?
  25. 25.8 + 2 + 3 =
  26. 26.1 + 1 + 1 =
  27. 27.4 + 16 =
  28. 28.3 + 3 + 3 =
  29. 29.6 + 3 + 2 =
  30. 30.There are 4 pink balloons and 2 red balloons. How many balloons are there in all?
  31. 31.Rahul has 3 mangoes and gets 9 mangoes more. How many mangoes does Rahul have now?
  32. 32.4 + 5 + 10 =
  33. 33.10 + ? = 18
  34. 34.7 + ? = 8
  35. 35.7 + 5 =
  36. 36.2 + 9 =
  37. 37.Isha has 10 crayons and gets 5 crayons more. How many crayons does Isha have now?
  38. 38.There are 5 blue kites and 7 red kites. How many kites are there in all?
  39. 39.Kabir has 13 kites and gets 6 kites more. How many kites does Kabir have now?
  40. 40.12 + 4 =

Answer key

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

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