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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 831 · 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. 1.9 + 11 =
  2. 2.7 + 4 =
  3. 3.10 + 1 =
  4. 4.There are 5 yellow balloons and 11 green balloons. How many balloons are there in all?
  5. 5.Zoya has 3 balloons and gets 4 balloons more. How many balloons does Zoya have now?
  6. 6.8 + 10 =
  7. 7.2 + 11 =
  8. 8.? + 10 = 18
  9. 9.5 + ? = 17
  10. 10.There are 6 red balls and 6 blue balls. How many balls are there in all?
  11. 11.Ishaan has 5 flowers and gets 12 flowers more. How many flowers does Ishaan have now?
  12. 12.? + 2 = 12
  13. 13.4 + 4 + 7 =
  14. 14.Joseph has 8 mangoes and gets 9 mangoes more. How many mangoes does Joseph have now?
  15. 15.6 + 3 + 6 =
  16. 16.8 + 2 + 1 =
  17. 17.There are 11 blue kites and 7 red kites. How many kites are there in all?
  18. 18.1 + 7 + 3 =
  19. 19.11 + 2 =
  20. 20.6 + 9 =
  21. 21.Kavya has 3 pencils and gets 16 pencils more. How many pencils does Kavya have now?
  22. 22.8 + 2 + 7 =
  23. 23.11 + ? = 18
  24. 24.There are 7 blue balls and 4 pink balls. How many balls are there in all?
  25. 25.1 + 6 =
  26. 26.There are 3 yellow flowers and 4 blue flowers. How many flowers are there in all?
  27. 27.1 + ? = 4
  28. 28.6 + ? = 17
  29. 29.6 + 1 + 7 =
  30. 30.6 + 3 + 1 =
  31. 31.1 + 2 + 15 =
  32. 32.1 + ? = 6
  33. 33.5 + 13 =
  34. 34.4 + 2 + 9 =
  35. 35.6 + 13 =
  36. 36.Kabir has 7 mangoes and gets 7 mangoes more. How many mangoes does Kabir have now?
  37. 37.18 + 2 =
  38. 38.11 + 6 =
  39. 39.There are 8 green balloons and 2 blue balloons. How many balloons are there in all?
  40. 40.1 + 5 + 10 =

Answer key

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

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