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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 777 · 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.Rahul has 11 balls and gets 2 balls more. How many balls does Rahul have now?
  2. 2.3 + 2 + 11 =
  3. 3.19 + 1 =
  4. 4.14 + 4 =
  5. 5.1 + ? = 3
  6. 6.? + 5 = 6
  7. 7.There are 3 white balls and 2 blue balls. How many balls are there in all?
  8. 8.There are 10 white crayons and 2 green crayons. How many crayons are there in all?
  9. 9.14 + 3 =
  10. 10.1 + 6 + 10 =
  11. 11.5 + 4 =
  12. 12.6 + 3 + 7 =
  13. 13.Lakshmi has 4 laddoos and gets 6 laddoos more. How many laddoos does Lakshmi have now?
  14. 14.3 + 15 =
  15. 15.Ishaan has 6 balls and gets 6 balls more. How many balls does Ishaan have now?
  16. 16.2 + ? = 20
  17. 17.There are 2 yellow beads and 17 blue beads. How many beads are there in all?
  18. 18.7 + ? = 13
  19. 19.There are 7 blue flowers and 8 green flowers. How many flowers are there in all?
  20. 20.Joseph has 11 mangoes and gets 5 mangoes more. How many mangoes does Joseph have now?
  21. 21.10 + ? = 20
  22. 22.? + 2 = 7
  23. 23.6 + 7 + 1 =
  24. 24.Kabir has 15 balls and gets 2 balls more. How many balls does Kabir have now?
  25. 25.Arjun has 4 balloons and gets 10 balloons more. How many balloons does Arjun have now?
  26. 26.5 + 14 =
  27. 27.9 + ? = 17
  28. 28.7 + 8 + 1 =
  29. 29.Aarav has 13 kites and gets 5 kites more. How many kites does Aarav have now?
  30. 30.9 + 6 =
  31. 31.3 + 1 + 4 =
  32. 32.2 + 10 =
  33. 33.There are 4 white kites and 3 pink kites. How many kites are there in all?
  34. 34.There are 8 blue balloons and 4 white balloons. How many balloons are there in all?
  35. 35.There are 9 white balloons and 6 blue balloons. How many balloons are there in all?
  36. 36.Aditya has 12 flowers and gets 4 flowers more. How many flowers does Aditya have now?
  37. 37.1 + ? = 18
  38. 38.Isha has 9 books and gets 10 books more. How many books does Isha have now?
  39. 39.There are 3 green crayons and 8 red crayons. How many crayons are there in all?
  40. 40.? + 1 = 6

Answer key

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

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