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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 21 · 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.There are 3 white flowers and 14 yellow flowers. How many flowers are there in all?
  2. 2.? + 1 = 5
  3. 3.Zoya has 11 crayons and gets 5 crayons more. How many crayons does Zoya have now?
  4. 4.1 + 6 + 11 =
  5. 5.There are 11 blue crayons and 6 pink crayons. How many crayons are there in all?
  6. 6.19 + 1 =
  7. 7.Rohan has 8 balls and gets 2 balls more. How many balls does Rohan have now?
  8. 8.There are 10 blue crayons and 4 red crayons. How many crayons are there in all?
  9. 9.There are 7 white balls and 6 red balls. How many balls are there in all?
  10. 10.5 + ? = 8
  11. 11.Kabir has 11 bananas and gets 9 bananas more. How many bananas does Kabir have now?
  12. 12.6 + ? = 9
  13. 13.15 + 4 =
  14. 14.There are 7 pink beads and 2 yellow beads. How many beads are there in all?
  15. 15.14 + 6 =
  16. 16.Kavya has 4 flowers and gets 4 flowers more. How many flowers does Kavya have now?
  17. 17.There are 9 red balls and 11 blue balls. How many balls are there in all?
  18. 18.? + 3 = 16
  19. 19.5 + 1 + 8 =
  20. 20.6 + 14 =
  21. 21.Rohan has 8 mangoes and gets 4 mangoes more. How many mangoes does Rohan have now?
  22. 22.18 + 1 =
  23. 23.5 + 5 + 1 =
  24. 24.There are 3 green balls and 3 white balls. How many balls are there in all?
  25. 25.Kavya has 7 books and gets 13 books more. How many books does Kavya have now?
  26. 26.Aditya has 3 mangoes and gets 15 mangoes more. How many mangoes does Aditya have now?
  27. 27.5 + 7 + 1 =
  28. 28.3 + ? = 4
  29. 29.5 + 5 + 8 =
  30. 30.There are 3 white balls and 7 blue balls. How many balls are there in all?
  31. 31.There are 2 white kites and 6 red kites. How many kites are there in all?
  32. 32.2 + 12 =
  33. 33.There are 10 pink kites and 3 blue kites. How many kites are there in all?
  34. 34.2 + 6 =
  35. 35.There are 9 pink balloons and 4 yellow balloons. How many balloons are there in all?
  36. 36.Arjun has 6 mangoes and gets 12 mangoes more. How many mangoes does Arjun have now?
  37. 37.There are 3 white balloons and 15 red balloons. How many balloons are there in all?
  38. 38.7 + 10 =
  39. 39.Aarav has 5 mangoes and gets 3 mangoes more. How many mangoes does Aarav have now?
  40. 40.There are 9 white kites and 8 yellow kites. How many kites are there in all?

Answer key

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

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