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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 420 · 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. 1.16 + ? = 18
  2. 2.1 + 3 + 15 =
  3. 3.4 + ? = 14
  4. 4.17 + 1 =
  5. 5.Tara has 14 shells and gets 2 shells more. How many shells does Tara have now?
  6. 6.7 + 1 =
  7. 7.Rahul has 3 books and gets 17 books more. How many books does Rahul have now?
  8. 8.There are 6 yellow kites and 3 red kites. How many kites are there in all?
  9. 9.7 + 1 + 2 =
  10. 10.8 + 2 =
  11. 11.16 + 1 =
  12. 12.18 + 1 =
  13. 13.Manav has 11 laddoos and gets 8 laddoos more. How many laddoos does Manav have now?
  14. 14.3 + 5 + 7 =
  15. 15.4 + 8 =
  16. 16.Tara has 4 shells and gets 6 shells more. How many shells does Tara have now?
  17. 17.? + 7 = 8
  18. 18.3 + ? = 4
  19. 19.9 + 6 =
  20. 20.7 + 3 + 2 =
  21. 21.There are 7 blue kites and 6 red kites. How many kites are there in all?
  22. 22.Ishaan has 8 mangoes and gets 4 mangoes more. How many mangoes does Ishaan have now?
  23. 23.4 + 7 + 9 =
  24. 24.5 + 1 + 6 =
  25. 25.? + 8 = 13
  26. 26.There are 11 pink beads and 2 red beads. How many beads are there in all?
  27. 27.There are 3 yellow kites and 2 pink kites. How many kites are there in all?
  28. 28.2 + 6 + 6 =
  29. 29.Kavya has 5 shells and gets 9 shells more. How many shells does Kavya have now?
  30. 30.Ishaan has 13 shells and gets 5 shells more. How many shells does Ishaan have now?
  31. 31.7 + 1 + 3 =
  32. 32.There are 7 pink crayons and 13 yellow crayons. How many crayons are there in all?
  33. 33.? + 10 = 19
  34. 34.Meera has 14 balls and gets 2 balls more. How many balls does Meera have now?
  35. 35.There are 2 pink flowers and 10 white flowers. How many flowers are there in all?
  36. 36.There are 9 yellow balls and 4 pink balls. How many balls are there in all?
  37. 37.18 + 2 =
  38. 38.8 + 5 + 7 =
  39. 39.8 + 2 + 10 =
  40. 40.Diya has 11 balls and gets 2 balls more. How many balls does Diya have now?

Answer key

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

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