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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 511 · 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. 1.7 + 2 =
  2. 2.7 + 4 + 9 =
  3. 3.Manav has 4 crayons and gets 14 crayons more. How many crayons does Manav have now?
  4. 4.17 + ? = 20
  5. 5.There are 9 pink flowers and 9 red flowers. How many flowers are there in all?
  6. 6.There are 2 red kites and 8 blue kites. How many kites are there in all?
  7. 7.3 + 1 + 14 =
  8. 8.There are 3 white kites and 5 blue kites. How many kites are there in all?
  9. 9.Aditya has 5 balls and gets 1 ball more. How many balls does Aditya have now?
  10. 10.7 + 10 =
  11. 11.? + 3 = 4
  12. 12.2 + ? = 9
  13. 13.2 + ? = 3
  14. 14.There are 12 blue beads and 5 white beads. How many beads are there in all?
  15. 15.2 + ? = 7
  16. 16.1 + ? = 4
  17. 17.There are 6 blue balloons and 8 pink balloons. How many balloons are there in all?
  18. 18.17 + 1 =
  19. 19.13 + 2 =
  20. 20.8 + 6 + 1 =
  21. 21.17 + ? = 18
  22. 22.13 + 5 =
  23. 23.6 + 7 =
  24. 24.5 + 7 + 1 =
  25. 25.10 + 10 =
  26. 26.Nisha has 8 marbles and gets 12 marbles more. How many marbles does Nisha have now?
  27. 27.2 + 7 + 10 =
  28. 28.Arjun has 10 mangoes and gets 3 mangoes more. How many mangoes does Arjun have now?
  29. 29.There are 6 red balls and 2 pink balls. How many balls are there in all?
  30. 30.3 + 1 =
  31. 31.10 + 2 =
  32. 32.Kabir has 10 balloons and gets 4 balloons more. How many balloons does Kabir have now?
  33. 33.Kavya has 5 books and gets 14 books more. How many books does Kavya have now?
  34. 34.There are 3 white kites and 14 red kites. How many kites are there in all?
  35. 35.5 + 6 =
  36. 36.6 + 7 + 7 =
  37. 37.5 + 5 + 1 =
  38. 38.6 + 1 + 11 =
  39. 39.Rohan has 9 flowers and gets 11 flowers more. How many flowers does Rohan have now?
  40. 40.8 + 6 + 2 =

Answer key

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

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