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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 918 · 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. 1.13 + ? = 18
  2. 2.2 + 8 =
  3. 3.There are 5 green beads and 3 white beads. How many beads are there in all?
  4. 4.12 + ? = 13
  5. 5.6 + ? = 16
  6. 6.? + 1 = 7
  7. 7.There are 3 green balloons and 17 white balloons. How many balloons are there in all?
  8. 8.There are 11 yellow balls and 5 red balls. How many balls are there in all?
  9. 9.1 + 4 =
  10. 10.3 + 4 =
  11. 11.2 + 7 + 6 =
  12. 12.1 + ? = 17
  13. 13.1 + 2 + 1 =
  14. 14.There are 10 yellow flowers and 10 pink flowers. How many flowers are there in all?
  15. 15.There are 9 yellow balls and 11 green balls. How many balls are there in all?
  16. 16.There are 8 yellow beads and 11 white beads. How many beads are there in all?
  17. 17.Ishaan has 12 marbles and gets 4 marbles more. How many marbles does Ishaan have now?
  18. 18.2 + 7 + 9 =
  19. 19.6 + 1 + 1 =
  20. 20.? + 4 = 5
  21. 21.Tara has 15 pencils and gets 3 pencils more. How many pencils does Tara have now?
  22. 22.There are 5 red balls and 11 green balls. How many balls are there in all?
  23. 23.1 + 8 + 7 =
  24. 24.6 + 6 + 4 =
  25. 25.2 + ? = 18
  26. 26.2 + 2 + 7 =
  27. 27.1 + 5 + 5 =
  28. 28.13 + 2 =
  29. 29.? + 2 = 8
  30. 30.5 + 2 =
  31. 31.There are 12 green flowers and 8 blue flowers. How many flowers are there in all?
  32. 32.10 + ? = 19
  33. 33.Arjun has 2 books and gets 2 books more. How many books does Arjun have now?
  34. 34.Diya has 15 pencils and gets 3 pencils more. How many pencils does Diya have now?
  35. 35.Joseph has 15 marbles and gets 1 marble more. How many marbles does Joseph have now?
  36. 36.2 + ? = 3
  37. 37.There are 11 green flowers and 4 pink flowers. How many flowers are there in all?
  38. 38.14 + 4 =
  39. 39.4 + ? = 9
  40. 40.There are 3 green crayons and 11 pink crayons. How many crayons are there in all?

Answer key

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

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