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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 872 · 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. 1.19 + 1 =
  2. 2.There are 11 white balloons and 8 blue balloons. How many balloons are there in all?
  3. 3.There are 6 white kites and 3 green kites. How many kites are there in all?
  4. 4.1 + 1 + 13 =
  5. 5.17 + 1 =
  6. 6.2 + 1 =
  7. 7.8 + ? = 15
  8. 8.7 + 6 + 3 =
  9. 9.2 + 13 =
  10. 10.1 + ? = 5
  11. 11.11 + 5 =
  12. 12.There are 12 red balls and 6 pink balls. How many balls are there in all?
  13. 13.2 + ? = 7
  14. 14.7 + 7 + 3 =
  15. 15.There are 9 red flowers and 4 blue flowers. How many flowers are there in all?
  16. 16.7 + 7 =
  17. 17.Vivaan has 9 pencils and gets 4 pencils more. How many pencils does Vivaan have now?
  18. 18.There are 11 green crayons and 8 white crayons. How many crayons are there in all?
  19. 19.10 + ? = 13
  20. 20.4 + 7 + 2 =
  21. 21.3 + 14 =
  22. 22.2 + 2 + 14 =
  23. 23.? + 6 = 9
  24. 24.Meera has 15 books and gets 2 books more. How many books does Meera have now?
  25. 25.16 + 4 =
  26. 26.13 + 5 =
  27. 27.13 + ? = 17
  28. 28.Saanvi has 13 shells and gets 2 shells more. How many shells does Saanvi have now?
  29. 29.Meera has 12 books and gets 5 books more. How many books does Meera have now?
  30. 30.4 + 1 + 6 =
  31. 31.There are 9 pink balloons and 11 red balloons. How many balloons are there in all?
  32. 32.7 + 6 + 4 =
  33. 33.There are 9 white balloons and 10 pink balloons. How many balloons are there in all?
  34. 34.There are 12 pink crayons and 6 green crayons. How many crayons are there in all?
  35. 35.There are 7 green crayons and 9 yellow crayons. How many crayons are there in all?
  36. 36.11 + 3 =
  37. 37.8 + ? = 16
  38. 38.There are 2 green flowers and 14 pink flowers. How many flowers are there in all?
  39. 39.2 + 16 =
  40. 40.9 + 3 =

Answer key

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

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