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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 875 · 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 + 8 + 6 =
  2. 2.13 + 3 =
  3. 3.? + 2 = 4
  4. 4.14 + 3 =
  5. 5.7 + ? = 15
  6. 6.Ishaan has 11 books and gets 2 books more. How many books does Ishaan have now?
  7. 7.10 + 9 =
  8. 8.Pooja has 3 bananas and gets 3 bananas more. How many bananas does Pooja have now?
  9. 9.1 + 1 + 10 =
  10. 10.4 + 8 =
  11. 11.8 + 10 =
  12. 12.6 + 14 =
  13. 13.3 + 8 =
  14. 14.7 + 1 + 11 =
  15. 15.6 + 2 + 5 =
  16. 16.8 + 4 + 2 =
  17. 17.17 + 3 =
  18. 18.2 + 6 + 2 =
  19. 19.There are 12 pink crayons and 7 red crayons. How many crayons are there in all?
  20. 20.6 + 5 =
  21. 21.5 + ? = 10
  22. 22.2 + 16 =
  23. 23.Manav has 13 bananas and gets 6 bananas more. How many bananas does Manav have now?
  24. 24.1 + ? = 16
  25. 25.There are 6 blue balloons and 6 red balloons. How many balloons are there in all?
  26. 26.4 + 4 + 6 =
  27. 27.3 + ? = 18
  28. 28.There are 10 green kites and 8 blue kites. How many kites are there in all?
  29. 29.There are 10 red kites and 3 yellow kites. How many kites are there in all?
  30. 30.There are 8 yellow kites and 5 red kites. How many kites are there in all?
  31. 31.1 + 5 + 12 =
  32. 32.Tara has 14 bananas and gets 1 banana more. How many bananas does Tara have now?
  33. 33.Saanvi has 4 bananas and gets 9 bananas more. How many bananas does Saanvi have now?
  34. 34.5 + 3 =
  35. 35.14 + 6 =
  36. 36.6 + 7 =
  37. 37.Dev has 15 balloons and gets 1 balloon more. How many balloons does Dev have now?
  38. 38.Kavya has 2 laddoos and gets 8 laddoos more. How many laddoos does Kavya have now?
  39. 39.2 + 8 + 1 =
  40. 40.There are 8 red balls and 10 white balls. How many balls are there in all?

Answer key

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

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