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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 499 · 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. 1.12 + 3 =
  2. 2.3 + 1 + 6 =
  3. 3.? + 8 = 10
  4. 4.Aditya has 11 crayons and gets 9 crayons more. How many crayons does Aditya have now?
  5. 5.Manav has 2 bananas and gets 9 bananas more. How many bananas does Manav have now?
  6. 6.Diya has 8 laddoos and gets 10 laddoos more. How many laddoos does Diya have now?
  7. 7.18 + 1 =
  8. 8.Riya has 6 crayons and gets 10 crayons more. How many crayons does Riya have now?
  9. 9.There are 2 pink kites and 13 red kites. How many kites are there in all?
  10. 10.19 + 1 =
  11. 11.13 + 3 =
  12. 12.? + 17 = 20
  13. 13.? + 2 = 7
  14. 14.3 + 4 =
  15. 15.2 + 12 =
  16. 16.2 + 6 + 1 =
  17. 17.? + 1 = 14
  18. 18.Sneha has 8 pencils and gets 3 pencils more. How many pencils does Sneha have now?
  19. 19.6 + 1 =
  20. 20.Sneha has 5 flowers and gets 11 flowers more. How many flowers does Sneha have now?
  21. 21.There are 2 pink flowers and 3 green flowers. How many flowers are there in all?
  22. 22.3 + 1 + 13 =
  23. 23.1 + 8 + 7 =
  24. 24.? + 6 = 11
  25. 25.8 + 11 =
  26. 26.Gurpreet has 10 marbles and gets 10 marbles more. How many marbles does Gurpreet have now?
  27. 27.1 + 8 + 4 =
  28. 28.Manav has 10 crayons and gets 9 crayons more. How many crayons does Manav have now?
  29. 29.? + 1 = 4
  30. 30.7 + 8 + 3 =
  31. 31.? + 5 = 6
  32. 32.There are 5 red beads and 9 pink beads. How many beads are there in all?
  33. 33.7 + 7 =
  34. 34.There are 10 blue crayons and 7 pink crayons. How many crayons are there in all?
  35. 35.Isha has 11 flowers and gets 8 flowers more. How many flowers does Isha have now?
  36. 36.8 + 2 + 3 =
  37. 37.There are 6 red beads and 10 blue beads. How many beads are there in all?
  38. 38.4 + 5 =
  39. 39.Aarav has 2 pencils and gets 12 pencils more. How many pencils does Aarav have now?
  40. 40.15 + 3 =

Answer key

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

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