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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 999 · 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.Joseph has 3 shells and gets 6 shells more. How many shells does Joseph have now?
  2. 2.17 + 3 =
  3. 3.Vivaan has 7 laddoos and gets 6 laddoos more. How many laddoos does Vivaan have now?
  4. 4.Diya has 4 pencils and gets 1 pencil more. How many pencils does Diya have now?
  5. 5.8 + 3 =
  6. 6.? + 1 = 6
  7. 7.14 + 6 =
  8. 8.1 + 13 =
  9. 9.There are 6 green kites and 3 blue kites. How many kites are there in all?
  10. 10.12 + 2 =
  11. 11.19 + 1 =
  12. 12.There are 3 yellow balloons and 11 green balloons. How many balloons are there in all?
  13. 13.Gurpreet has 11 mangoes and gets 6 mangoes more. How many mangoes does Gurpreet have now?
  14. 14.There are 4 blue balls and 12 yellow balls. How many balls are there in all?
  15. 15.There are 2 yellow balls and 4 white balls. How many balls are there in all?
  16. 16.Riya has 5 flowers and gets 4 flowers more. How many flowers does Riya have now?
  17. 17.1 + 2 + 4 =
  18. 18.14 + 3 =
  19. 19.6 + 2 =
  20. 20.8 + 2 + 5 =
  21. 21.8 + 2 =
  22. 22.7 + 11 =
  23. 23.17 + 2 =
  24. 24.Zoya has 3 pencils and gets 15 pencils more. How many pencils does Zoya have now?
  25. 25.There are 6 green balls and 6 white balls. How many balls are there in all?
  26. 26.Pooja has 4 crayons and gets 13 crayons more. How many crayons does Pooja have now?
  27. 27.Aditya has 4 laddoos and gets 3 laddoos more. How many laddoos does Aditya have now?
  28. 28.3 + 6 =
  29. 29.There are 3 yellow kites and 12 white kites. How many kites are there in all?
  30. 30.7 + ? = 9
  31. 31.6 + 6 + 8 =
  32. 32.4 + 3 + 3 =
  33. 33.1 + 5 + 3 =
  34. 34.? + 8 = 19
  35. 35.1 + 12 =
  36. 36.4 + 3 =
  37. 37.There are 3 red balls and 17 yellow balls. How many balls are there in all?
  38. 38.1 + ? = 4
  39. 39.There are 10 red balls and 4 blue balls. How many balls are there in all?
  40. 40.18 + 2 =

Answer key

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

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