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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 333 · 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. 1.8 + 2 =
  2. 2.Zoya has 13 laddoos and gets 6 laddoos more. How many laddoos does Zoya have now?
  3. 3.7 + 2 + 3 =
  4. 4.6 + 5 + 2 =
  5. 5.1 + ? = 15
  6. 6.Vivaan has 5 books and gets 15 books more. How many books does Vivaan have now?
  7. 7.8 + ? = 10
  8. 8.18 + 2 =
  9. 9.Rohan has 8 flowers and gets 5 flowers more. How many flowers does Rohan have now?
  10. 10.There are 6 white beads and 9 green beads. How many beads are there in all?
  11. 11.? + 6 = 8
  12. 12.There are 12 white flowers and 8 red flowers. How many flowers are there in all?
  13. 13.2 + 2 + 2 =
  14. 14.7 + 3 + 10 =
  15. 15.4 + 7 =
  16. 16.10 + ? = 15
  17. 17.8 + 6 + 1 =
  18. 18.There are 3 green balloons and 3 yellow balloons. How many balloons are there in all?
  19. 19.3 + 2 =
  20. 20.13 + 3 =
  21. 21.Rohan has 5 shells and gets 8 shells more. How many shells does Rohan have now?
  22. 22.? + 3 = 4
  23. 23.? + 1 = 5
  24. 24.There are 11 green crayons and 2 pink crayons. How many crayons are there in all?
  25. 25.2 + 8 + 6 =
  26. 26.4 + 4 + 8 =
  27. 27.There are 6 blue flowers and 5 red flowers. How many flowers are there in all?
  28. 28.16 + 1 =
  29. 29.4 + 2 + 3 =
  30. 30.There are 3 blue crayons and 3 red crayons. How many crayons are there in all?
  31. 31.2 + 3 =
  32. 32.6 + 1 + 5 =
  33. 33.There are 2 blue balls and 4 white balls. How many balls are there in all?
  34. 34.? + 9 = 11
  35. 35.? + 13 = 17
  36. 36.3 + ? = 6
  37. 37.Dev has 10 kites and gets 6 kites more. How many kites does Dev have now?
  38. 38.Lakshmi has 6 flowers and gets 13 flowers more. How many flowers does Lakshmi have now?
  39. 39.10 + ? = 12
  40. 40.? + 3 = 15

Answer key

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

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