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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 419 · 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. 1.2 + ? = 3
  2. 2.There are 12 yellow beads and 2 red beads. How many beads are there in all?
  3. 3.8 + 7 =
  4. 4.6 + 6 + 7 =
  5. 5.There are 4 red beads and 9 white beads. How many beads are there in all?
  6. 6.There are 11 blue beads and 8 green beads. How many beads are there in all?
  7. 7.Manav has 12 crayons and gets 4 crayons more. How many crayons does Manav have now?
  8. 8.8 + 5 + 4 =
  9. 9.3 + 1 =
  10. 10.4 + 2 + 10 =
  11. 11.8 + ? = 9
  12. 12.15 + 4 =
  13. 13.17 + 2 =
  14. 14.1 + 4 + 14 =
  15. 15.1 + ? = 9
  16. 16.4 + 1 + 13 =
  17. 17.5 + ? = 11
  18. 18.Saanvi has 6 balls and gets 10 balls more. How many balls does Saanvi have now?
  19. 19.2 + 3 + 6 =
  20. 20.Saanvi has 15 books and gets 4 books more. How many books does Saanvi have now?
  21. 21.Aarav has 7 pencils and gets 10 pencils more. How many pencils does Aarav have now?
  22. 22.7 + 6 + 4 =
  23. 23.1 + ? = 19
  24. 24.4 + 1 =
  25. 25.Diya has 4 laddoos and gets 7 laddoos more. How many laddoos does Diya have now?
  26. 26.4 + 15 =
  27. 27.Dev has 5 books and gets 1 book more. How many books does Dev have now?
  28. 28.There are 4 green flowers and 9 yellow flowers. How many flowers are there in all?
  29. 29.? + 17 = 20
  30. 30.4 + ? = 6
  31. 31.There are 6 red balls and 6 blue balls. How many balls are there in all?
  32. 32.5 + ? = 6
  33. 33.18 + 2 =
  34. 34.Nisha has 13 crayons and gets 1 crayon more. How many crayons does Nisha have now?
  35. 35.6 + 5 + 6 =
  36. 36.Tara has 5 kites and gets 13 kites more. How many kites does Tara have now?
  37. 37.Rahul has 14 books and gets 6 books more. How many books does Rahul have now?
  38. 38.Aditya has 5 bananas and gets 2 bananas more. How many bananas does Aditya have now?
  39. 39.10 + 9 =
  40. 40.4 + 3 =

Answer key

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

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