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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 137 · 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 white balloons and 10 blue balloons. How many balloons are there in all?
  2. 2.2 + ? = 8
  3. 3.5 + 8 + 2 =
  4. 4.15 + 4 =
  5. 5.1 + ? = 3
  6. 6.Aditya has 9 kites and gets 10 kites more. How many kites does Aditya have now?
  7. 7.2 + 3 + 8 =
  8. 8.1 + 7 + 11 =
  9. 9.There are 11 green balloons and 4 pink balloons. How many balloons are there in all?
  10. 10.2 + 6 =
  11. 11.Aditya has 7 pencils and gets 13 pencils more. How many pencils does Aditya have now?
  12. 12.6 + 2 + 2 =
  13. 13.There are 5 blue balls and 4 white balls. How many balls are there in all?
  14. 14.Diya has 5 pencils and gets 9 pencils more. How many pencils does Diya have now?
  15. 15.4 + 8 + 3 =
  16. 16.There are 2 pink beads and 3 green beads. How many beads are there in all?
  17. 17.2 + ? = 6
  18. 18.8 + ? = 20
  19. 19.Zoya has 15 marbles and gets 1 marble more. How many marbles does Zoya have now?
  20. 20.Aarav has 14 balloons and gets 1 balloon more. How many balloons does Aarav have now?
  21. 21.6 + 1 =
  22. 22.5 + 12 =
  23. 23.There are 11 blue beads and 8 red beads. How many beads are there in all?
  24. 24.3 + ? = 6
  25. 25.2 + ? = 10
  26. 26.6 + 5 =
  27. 27.Manav has 10 laddoos and gets 10 laddoos more. How many laddoos does Manav have now?
  28. 28.Kavya has 12 marbles and gets 3 marbles more. How many marbles does Kavya have now?
  29. 29.There are 9 pink balls and 6 blue balls. How many balls are there in all?
  30. 30.There are 12 pink kites and 3 red kites. How many kites are there in all?
  31. 31.1 + 7 + 1 =
  32. 32.12 + 5 =
  33. 33.There are 4 blue flowers and 9 white flowers. How many flowers are there in all?
  34. 34.12 + 6 =
  35. 35.14 + 4 =
  36. 36.6 + 8 + 5 =
  37. 37.? + 3 = 17
  38. 38.15 + ? = 19
  39. 39.11 + 9 =
  40. 40.1 + 7 + 12 =

Answer key

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

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