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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 633 · 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 + 4 + 7 =
  2. 2.1 + ? = 3
  3. 3.5 + 6 + 1 =
  4. 4.? + 9 = 15
  5. 5.2 + 2 =
  6. 6.There are 11 green kites and 7 red kites. How many kites are there in all?
  7. 7.5 + 5 + 7 =
  8. 8.? + 5 = 10
  9. 9.? + 2 = 13
  10. 10.4 + ? = 17
  11. 11.There are 3 red beads and 12 white beads. How many beads are there in all?
  12. 12.17 + 1 =
  13. 13.1 + 15 =
  14. 14.Meera has 3 balloons and gets 2 balloons more. How many balloons does Meera have now?
  15. 15.1 + 6 + 1 =
  16. 16.12 + 4 =
  17. 17.There are 2 yellow crayons and 16 red crayons. How many crayons are there in all?
  18. 18.5 + 6 + 5 =
  19. 19.Ishaan has 3 balloons and gets 12 balloons more. How many balloons does Ishaan have now?
  20. 20.? + 12 = 15
  21. 21.? + 2 = 6
  22. 22.Diya has 11 books and gets 8 books more. How many books does Diya have now?
  23. 23.? + 3 = 17
  24. 24.1 + 1 =
  25. 25.There are 8 yellow kites and 10 green kites. How many kites are there in all?
  26. 26.Kavya has 4 bananas and gets 7 bananas more. How many bananas does Kavya have now?
  27. 27.17 + 3 =
  28. 28.? + 1 = 4
  29. 29.? + 5 = 6
  30. 30.? + 1 = 6
  31. 31.Saanvi has 9 laddoos and gets 4 laddoos more. How many laddoos does Saanvi have now?
  32. 32.6 + 4 + 3 =
  33. 33.10 + ? = 19
  34. 34.6 + ? = 8
  35. 35.2 + ? = 10
  36. 36.There are 9 yellow balls and 4 blue balls. How many balls are there in all?
  37. 37.There are 4 pink balls and 6 red balls. How many balls are there in all?
  38. 38.Sneha has 11 bananas and gets 2 bananas more. How many bananas does Sneha have now?
  39. 39.18 + 1 =
  40. 40.? + 2 = 7

Answer key

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

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