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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 350 · 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. 1.1 + 2 + 17 =
  2. 2.There are 10 blue beads and 4 green beads. How many beads are there in all?
  3. 3.There are 6 yellow flowers and 13 blue flowers. How many flowers are there in all?
  4. 4.1 + 5 + 3 =
  5. 5.Aarav has 4 balls and gets 10 balls more. How many balls does Aarav have now?
  6. 6.1 + 5 + 4 =
  7. 7.Aarav has 10 shells and gets 10 shells more. How many shells does Aarav have now?
  8. 8.4 + ? = 7
  9. 9.There are 9 white balloons and 9 pink balloons. How many balloons are there in all?
  10. 10.19 + 1 =
  11. 11.Joseph has 6 shells and gets 1 shell more. How many shells does Joseph have now?
  12. 12.16 + 3 =
  13. 13.1 + ? = 17
  14. 14.Joseph has 11 books and gets 1 book more. How many books does Joseph have now?
  15. 15.? + 9 = 18
  16. 16.1 + 6 + 2 =
  17. 17.13 + 6 =
  18. 18.15 + 2 =
  19. 19.6 + 5 =
  20. 20.9 + ? = 17
  21. 21.? + 12 = 20
  22. 22.1 + 7 + 8 =
  23. 23.5 + 7 + 3 =
  24. 24.? + 18 = 19
  25. 25.8 + 6 + 6 =
  26. 26.Isha has 15 crayons and gets 2 crayons more. How many crayons does Isha have now?
  27. 27.There are 4 red beads and 3 blue beads. How many beads are there in all?
  28. 28.2 + 2 + 7 =
  29. 29.6 + 3 =
  30. 30.6 + 7 + 4 =
  31. 31.Gurpreet has 14 marbles and gets 4 marbles more. How many marbles does Gurpreet have now?
  32. 32.Ishaan has 10 crayons and gets 8 crayons more. How many crayons does Ishaan have now?
  33. 33.1 + ? = 3
  34. 34.1 + 16 =
  35. 35.There are 9 yellow kites and 7 white kites. How many kites are there in all?
  36. 36.Aditya has 11 flowers and gets 3 flowers more. How many flowers does Aditya have now?
  37. 37.Priya has 2 pencils and gets 10 pencils more. How many pencils does Priya have now?
  38. 38.There are 10 blue beads and 5 green beads. How many beads are there in all?
  39. 39.1 + 4 + 8 =
  40. 40.2 + 3 + 3 =

Answer key

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

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