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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 770 · 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 + 9 =
  2. 2.7 + 1 + 7 =
  3. 3.There are 2 pink flowers and 16 white flowers. How many flowers are there in all?
  4. 4.4 + 16 =
  5. 5.5 + 10 =
  6. 6.5 + 6 + 5 =
  7. 7.5 + 9 =
  8. 8.5 + 8 + 4 =
  9. 9.4 + 2 + 14 =
  10. 10.1 + ? = 10
  11. 11.? + 5 = 14
  12. 12.11 + ? = 14
  13. 13.There are 7 red crayons and 11 green crayons. How many crayons are there in all?
  14. 14.There are 2 green balloons and 13 pink balloons. How many balloons are there in all?
  15. 15.1 + ? = 13
  16. 16.17 + 2 =
  17. 17.There are 2 pink flowers and 4 green flowers. How many flowers are there in all?
  18. 18.Diya has 9 pencils and gets 2 pencils more. How many pencils does Diya have now?
  19. 19.7 + 7 + 1 =
  20. 20.8 + ? = 15
  21. 21.7 + ? = 9
  22. 22.15 + 3 =
  23. 23.3 + 8 + 7 =
  24. 24.Farhan has 6 mangoes and gets 3 mangoes more. How many mangoes does Farhan have now?
  25. 25.5 + 5 + 10 =
  26. 26.? + 8 = 12
  27. 27.11 + 4 =
  28. 28.2 + 1 + 3 =
  29. 29.There are 7 blue kites and 9 white kites. How many kites are there in all?
  30. 30.5 + 3 =
  31. 31.5 + 3 + 12 =
  32. 32.? + 3 = 9
  33. 33.Meera has 15 mangoes and gets 3 mangoes more. How many mangoes does Meera have now?
  34. 34.16 + 3 =
  35. 35.2 + ? = 18
  36. 36.18 + 1 =
  37. 37.6 + 2 =
  38. 38.Joseph has 6 crayons and gets 3 crayons more. How many crayons does Joseph have now?
  39. 39.5 + ? = 8
  40. 40.4 + 10 =

Answer key

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

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