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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 123 · 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.? + 6 = 8
  2. 2.Sneha has 14 books and gets 4 books more. How many books does Sneha have now?
  3. 3.8 + 3 + 6 =
  4. 4.There are 4 red balloons and 3 blue balloons. How many balloons are there in all?
  5. 5.? + 10 = 16
  6. 6.4 + ? = 20
  7. 7.There are 12 white crayons and 6 blue crayons. How many crayons are there in all?
  8. 8.10 + ? = 12
  9. 9.11 + 3 =
  10. 10.Kabir has 7 mangoes and gets 5 mangoes more. How many mangoes does Kabir have now?
  11. 11.9 + 7 =
  12. 12.7 + 3 + 8 =
  13. 13.2 + 11 =
  14. 14.19 + 1 =
  15. 15.11 + ? = 12
  16. 16.There are 12 pink balls and 8 blue balls. How many balls are there in all?
  17. 17.Rohan has 8 books and gets 10 books more. How many books does Rohan have now?
  18. 18.13 + 2 =
  19. 19.2 + 8 + 2 =
  20. 20.There are 3 blue beads and 11 green beads. How many beads are there in all?
  21. 21.3 + ? = 13
  22. 22.? + 1 = 9
  23. 23.There are 2 blue kites and 13 pink kites. How many kites are there in all?
  24. 24.Rahul has 10 laddoos and gets 5 laddoos more. How many laddoos does Rahul have now?
  25. 25.Lakshmi has 11 kites and gets 7 kites more. How many kites does Lakshmi have now?
  26. 26.8 + ? = 19
  27. 27.5 + 6 + 4 =
  28. 28.Farhan has 13 marbles and gets 4 marbles more. How many marbles does Farhan have now?
  29. 29.1 + 5 + 14 =
  30. 30.8 + 5 =
  31. 31.5 + 7 =
  32. 32.? + 4 = 18
  33. 33.8 + 3 + 8 =
  34. 34.4 + 16 =
  35. 35.3 + 4 + 2 =
  36. 36.3 + 13 =
  37. 37.There are 2 blue flowers and 18 white flowers. How many flowers are there in all?
  38. 38.6 + 6 + 7 =
  39. 39.5 + 15 =
  40. 40.There are 8 pink kites and 2 yellow kites. How many kites are there in all?

Answer key

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

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