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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 478 · 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 6 green flowers and 13 white flowers. How many flowers are there in all?
  3. 3.10 + ? = 14
  4. 4.1 + 16 =
  5. 5.4 + ? = 12
  6. 6.? + 12 = 19
  7. 7.6 + ? = 10
  8. 8.6 + 8 + 1 =
  9. 9.Joseph has 8 crayons and gets 2 crayons more. How many crayons does Joseph have now?
  10. 10.5 + 4 + 1 =
  11. 11.8 + 3 + 8 =
  12. 12.8 + 4 + 8 =
  13. 13.There are 2 pink flowers and 7 blue flowers. How many flowers are there in all?
  14. 14.There are 5 blue flowers and 5 white flowers. How many flowers are there in all?
  15. 15.8 + 6 + 1 =
  16. 16.3 + 7 + 5 =
  17. 17.3 + ? = 17
  18. 18.There are 11 red flowers and 5 yellow flowers. How many flowers are there in all?
  19. 19.There are 12 blue kites and 7 red kites. How many kites are there in all?
  20. 20.6 + ? = 18
  21. 21.? + 1 = 4
  22. 22.8 + 5 + 2 =
  23. 23.5 + ? = 10
  24. 24.15 + 1 =
  25. 25.5 + 8 + 3 =
  26. 26.There are 4 blue balloons and 11 red balloons. How many balloons are there in all?
  27. 27.11 + 8 =
  28. 28.13 + 3 =
  29. 29.Sneha has 6 shells and gets 1 shell more. How many shells does Sneha have now?
  30. 30.Rohan has 10 mangoes and gets 2 mangoes more. How many mangoes does Rohan have now?
  31. 31.8 + 1 + 9 =
  32. 32.1 + ? = 10
  33. 33.2 + ? = 3
  34. 34.Zoya has 12 flowers and gets 2 flowers more. How many flowers does Zoya have now?
  35. 35.4 + 1 + 8 =
  36. 36.4 + 4 =
  37. 37.14 + 3 =
  38. 38.There are 9 green beads and 7 blue beads. How many beads are there in all?
  39. 39.Gurpreet has 12 balloons and gets 8 balloons more. How many balloons does Gurpreet have now?
  40. 40.Pooja has 12 mangoes and gets 4 mangoes more. How many mangoes does Pooja have now?

Answer key

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

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