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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 140 · 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.Kabir has 12 marbles and gets 7 marbles more. How many marbles does Kabir have now?
  2. 2.11 + 6 =
  3. 3.There are 9 green balls and 3 white balls. How many balls are there in all?
  4. 4.There are 4 blue crayons and 15 white crayons. How many crayons are there in all?
  5. 5.8 + 7 + 4 =
  6. 6.? + 3 = 13
  7. 7.? + 1 = 5
  8. 8.There are 6 white kites and 4 yellow kites. How many kites are there in all?
  9. 9.11 + 2 =
  10. 10.Pooja has 10 balloons and gets 3 balloons more. How many balloons does Pooja have now?
  11. 11.2 + 13 =
  12. 12.3 + 5 =
  13. 13.8 + 5 =
  14. 14.? + 5 = 6
  15. 15.There are 9 pink crayons and 2 blue crayons. How many crayons are there in all?
  16. 16.? + 9 = 19
  17. 17.15 + 1 =
  18. 18.17 + ? = 18
  19. 19.7 + 4 + 8 =
  20. 20.2 + 7 + 8 =
  21. 21.4 + 6 + 4 =
  22. 22.There are 2 red kites and 8 pink kites. How many kites are there in all?
  23. 23.There are 3 red balls and 14 pink balls. How many balls are there in all?
  24. 24.There are 6 green balloons and 3 blue balloons. How many balloons are there in all?
  25. 25.Pooja has 13 laddoos and gets 3 laddoos more. How many laddoos does Pooja have now?
  26. 26.Lakshmi has 8 balls and gets 9 balls more. How many balls does Lakshmi have now?
  27. 27.Rahul has 14 flowers and gets 3 flowers more. How many flowers does Rahul have now?
  28. 28.1 + ? = 4
  29. 29.14 + 6 =
  30. 30.There are 6 yellow flowers and 3 pink flowers. How many flowers are there in all?
  31. 31.2 + ? = 13
  32. 32.2 + 10 =
  33. 33.6 + 3 =
  34. 34.8 + 1 + 11 =
  35. 35.9 + 7 =
  36. 36.6 + 4 + 6 =
  37. 37.15 + 4 =
  38. 38.12 + 6 =
  39. 39.Karan has 13 shells and gets 4 shells more. How many shells does Karan have now?
  40. 40.? + 3 = 10

Answer key

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

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