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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 425 · 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. 2.4 + 8 =
  3. 3.1 + 8 =
  4. 4.There are 10 pink balloons and 5 green balloons. How many balloons are there in all?
  5. 5.3 + 5 + 5 =
  6. 6.6 + 1 =
  7. 7.6 + ? = 15
  8. 8.Ishaan has 6 kites and gets 11 kites more. How many kites does Ishaan have now?
  9. 9.1 + ? = 8
  10. 10.2 + ? = 11
  11. 11.Kavya has 10 crayons and gets 1 crayon more. How many crayons does Kavya have now?
  12. 12.6 + 1 + 4 =
  13. 13.Sneha has 2 books and gets 16 books more. How many books does Sneha have now?
  14. 14.Joseph has 2 books and gets 17 books more. How many books does Joseph have now?
  15. 15.1 + 1 + 15 =
  16. 16.There are 11 yellow flowers and 7 blue flowers. How many flowers are there in all?
  17. 17.Arjun has 13 balloons and gets 7 balloons more. How many balloons does Arjun have now?
  18. 18.? + 6 = 9
  19. 19.11 + 1 =
  20. 20.? + 1 = 5
  21. 21.9 + ? = 14
  22. 22.10 + 8 =
  23. 23.9 + 10 =
  24. 24.12 + 2 =
  25. 25.Manav has 15 marbles and gets 1 marble more. How many marbles does Manav have now?
  26. 26.10 + 4 =
  27. 27.There are 8 blue balls and 5 pink balls. How many balls are there in all?
  28. 28.2 + ? = 14
  29. 29.There are 3 red beads and 9 yellow beads. How many beads are there in all?
  30. 30.Ananya has 5 pencils and gets 10 pencils more. How many pencils does Ananya have now?
  31. 31.2 + 18 =
  32. 32.8 + ? = 18
  33. 33.There are 8 white balloons and 3 pink balloons. How many balloons are there in all?
  34. 34.1 + 4 =
  35. 35.Joseph has 7 pencils and gets 9 pencils more. How many pencils does Joseph have now?
  36. 36.There are 12 red kites and 3 blue kites. How many kites are there in all?
  37. 37.8 + 3 + 4 =
  38. 38.1 + 19 =
  39. 39.3 + 3 + 8 =
  40. 40.9 + 2 =

Answer key

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

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