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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 83 · 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.? + 6 = 15
  2. 2.Riya has 7 marbles and gets 9 marbles more. How many marbles does Riya have now?
  3. 3.? + 1 = 19
  4. 4.There are 7 green crayons and 2 yellow crayons. How many crayons are there in all?
  5. 5.Lakshmi has 9 balls and gets 1 ball more. How many balls does Lakshmi have now?
  6. 6.11 + 9 =
  7. 7.There are 3 green beads and 7 white beads. How many beads are there in all?
  8. 8.9 + 1 =
  9. 9.There are 9 red balls and 8 green balls. How many balls are there in all?
  10. 10.Kabir has 5 books and gets 4 books more. How many books does Kabir have now?
  11. 11.8 + 6 + 3 =
  12. 12.1 + 14 =
  13. 13.13 + 2 =
  14. 14.5 + 1 + 14 =
  15. 15.There are 12 green crayons and 2 pink crayons. How many crayons are there in all?
  16. 16.There are 11 green flowers and 6 pink flowers. How many flowers are there in all?
  17. 17.18 + 2 =
  18. 18.19 + 1 =
  19. 19.8 + ? = 13
  20. 20.7 + 4 + 3 =
  21. 21.There are 4 yellow balloons and 3 pink balloons. How many balloons are there in all?
  22. 22.1 + 11 =
  23. 23.Vivaan has 12 crayons and gets 5 crayons more. How many crayons does Vivaan have now?
  24. 24.4 + 8 + 8 =
  25. 25.4 + ? = 9
  26. 26.7 + 4 + 8 =
  27. 27.There are 4 red kites and 12 yellow kites. How many kites are there in all?
  28. 28.5 + ? = 9
  29. 29.7 + ? = 17
  30. 30.? + 11 = 15
  31. 31.3 + ? = 8
  32. 32.There are 3 pink kites and 16 red kites. How many kites are there in all?
  33. 33.6 + ? = 8
  34. 34.There are 7 red beads and 9 green beads. How many beads are there in all?
  35. 35.3 + 2 + 6 =
  36. 36.? + 9 = 18
  37. 37.4 + 2 + 13 =
  38. 38.7 + ? = 18
  39. 39.Rahul has 12 flowers and gets 7 flowers more. How many flowers does Rahul have now?
  40. 40.14 + 4 =

Answer key

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

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