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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 405 · 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. 1.7 + 8 + 5 =
  2. 2.Diya has 6 balls and gets 2 balls more. How many balls does Diya have now?
  3. 3.1 + 13 =
  4. 4.There are 4 pink crayons and 5 red crayons. How many crayons are there in all?
  5. 5.3 + 6 + 5 =
  6. 6.There are 3 pink crayons and 16 white crayons. How many crayons are there in all?
  7. 7.3 + 13 =
  8. 8.5 + 3 + 8 =
  9. 9.Sneha has 9 laddoos and gets 4 laddoos more. How many laddoos does Sneha have now?
  10. 10.17 + 2 =
  11. 11.3 + ? = 17
  12. 12.19 + 1 =
  13. 13.8 + 1 + 5 =
  14. 14.5 + 9 =
  15. 15.8 + 5 + 4 =
  16. 16.10 + 1 =
  17. 17.There are 7 pink balls and 3 green balls. How many balls are there in all?
  18. 18.4 + 4 + 12 =
  19. 19.1 + ? = 3
  20. 20.5 + ? = 6
  21. 21.Aarav has 11 laddoos and gets 9 laddoos more. How many laddoos does Aarav have now?
  22. 22.? + 12 = 16
  23. 23.There are 9 blue balls and 8 red balls. How many balls are there in all?
  24. 24.12 + ? = 13
  25. 25.There are 2 pink balloons and 12 blue balloons. How many balloons are there in all?
  26. 26.Ananya has 3 flowers and gets 10 flowers more. How many flowers does Ananya have now?
  27. 27.9 + 5 =
  28. 28.There are 11 green balls and 4 red balls. How many balls are there in all?
  29. 29.2 + 4 + 11 =
  30. 30.2 + ? = 9
  31. 31.? + 12 = 15
  32. 32.2 + ? = 3
  33. 33.Riya has 10 crayons and gets 10 crayons more. How many crayons does Riya have now?
  34. 34.5 + 7 + 6 =
  35. 35.13 + 7 =
  36. 36.Sneha has 3 kites and gets 1 kite more. How many kites does Sneha have now?
  37. 37.Kavya has 2 flowers and gets 13 flowers more. How many flowers does Kavya have now?
  38. 38.There are 10 red kites and 3 blue kites. How many kites are there in all?
  39. 39.12 + 1 =
  40. 40.11 + 9 =

Answer key

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

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