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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 300 · 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.Diya has 10 crayons and gets 5 crayons more. How many crayons does Diya have now?
  2. 2.Arjun has 10 balloons and gets 8 balloons more. How many balloons does Arjun have now?
  3. 3.? + 4 = 20
  4. 4.Farhan has 7 flowers and gets 8 flowers more. How many flowers does Farhan have now?
  5. 5.1 + 2 =
  6. 6.6 + 3 =
  7. 7.Rahul has 14 crayons and gets 3 crayons more. How many crayons does Rahul have now?
  8. 8.2 + 1 + 1 =
  9. 9.3 + 6 + 5 =
  10. 10.5 + 8 + 1 =
  11. 11.1 + ? = 4
  12. 12.8 + ? = 17
  13. 13.There are 4 green crayons and 9 red crayons. How many crayons are there in all?
  14. 14.? + 10 = 15
  15. 15.There are 10 pink crayons and 2 yellow crayons. How many crayons are there in all?
  16. 16.16 + 4 =
  17. 17.There are 3 green crayons and 12 pink crayons. How many crayons are there in all?
  18. 18.Aarav has 13 pencils and gets 5 pencils more. How many pencils does Aarav have now?
  19. 19.15 + 1 =
  20. 20.There are 12 pink balls and 4 white balls. How many balls are there in all?
  21. 21.19 + 1 =
  22. 22.Farhan has 10 balls and gets 5 balls more. How many balls does Farhan have now?
  23. 23.5 + ? = 7
  24. 24.There are 11 blue crayons and 2 red crayons. How many crayons are there in all?
  25. 25.1 + 12 =
  26. 26.1 + 18 =
  27. 27.Priya has 4 shells and gets 13 shells more. How many shells does Priya have now?
  28. 28.5 + 1 =
  29. 29.Priya has 15 balloons and gets 1 balloon more. How many balloons does Priya have now?
  30. 30.12 + 4 =
  31. 31.2 + 8 + 1 =
  32. 32.There are 6 green balls and 13 blue balls. How many balls are there in all?
  33. 33.5 + 2 =
  34. 34.? + 3 = 10
  35. 35.There are 7 pink kites and 4 blue kites. How many kites are there in all?
  36. 36.There are 2 white kites and 11 blue kites. How many kites are there in all?
  37. 37.Aditya has 2 balls and gets 13 balls more. How many balls does Aditya have now?
  38. 38.18 + 2 =
  39. 39.3 + 7 + 6 =
  40. 40.? + 3 = 4

Answer key

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

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