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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 308 · 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.There are 4 yellow crayons and 10 red crayons. How many crayons are there in all?
  2. 2.There are 3 red crayons and 6 yellow crayons. How many crayons are there in all?
  3. 3.There are 2 white crayons and 13 blue crayons. How many crayons are there in all?
  4. 4.4 + 8 + 4 =
  5. 5.7 + 1 + 6 =
  6. 6.1 + 9 =
  7. 7.17 + 1 =
  8. 8.15 + 3 =
  9. 9.Joseph has 10 flowers and gets 2 flowers more. How many flowers does Joseph have now?
  10. 10.? + 5 = 9
  11. 11.? + 12 = 13
  12. 12.19 + 1 =
  13. 13.Farhan has 7 shells and gets 4 shells more. How many shells does Farhan have now?
  14. 14.Rohan has 12 shells and gets 3 shells more. How many shells does Rohan have now?
  15. 15.4 + ? = 8
  16. 16.4 + 4 =
  17. 17.3 + 6 + 9 =
  18. 18.7 + 2 + 3 =
  19. 19.Ananya has 6 laddoos and gets 12 laddoos more. How many laddoos does Ananya have now?
  20. 20.? + 1 = 3
  21. 21.5 + ? = 6
  22. 22.There are 8 red kites and 2 green kites. How many kites are there in all?
  23. 23.Kabir has 10 balloons and gets 8 balloons more. How many balloons does Kabir have now?
  24. 24.7 + 5 + 2 =
  25. 25.Pooja has 4 shells and gets 15 shells more. How many shells does Pooja have now?
  26. 26.? + 5 = 7
  27. 27.1 + 12 =
  28. 28.5 + 7 + 3 =
  29. 29.18 + 2 =
  30. 30.3 + 5 + 5 =
  31. 31.2 + ? = 9
  32. 32.There are 10 blue kites and 10 red kites. How many kites are there in all?
  33. 33.Sneha has 7 bananas and gets 7 bananas more. How many bananas does Sneha have now?
  34. 34.5 + 6 =
  35. 35.1 + ? = 3
  36. 36.? + 3 = 4
  37. 37.Dev has 14 balloons and gets 5 balloons more. How many balloons does Dev have now?
  38. 38.There are 12 yellow flowers and 7 white flowers. How many flowers are there in all?
  39. 39.Meera has 14 pencils and gets 6 pencils more. How many pencils does Meera have now?
  40. 40.? + 15 = 20

Answer key

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

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