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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 480 · 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. 1.11 + 2 =
  2. 2.19 + 1 =
  3. 3.6 + ? = 11
  4. 4.Nisha has 15 mangoes and gets 2 mangoes more. How many mangoes does Nisha have now?
  5. 5.7 + 6 + 5 =
  6. 6.8 + 8 + 3 =
  7. 7.7 + 5 + 1 =
  8. 8.17 + 3 =
  9. 9.12 + 8 =
  10. 10.There are 6 white balloons and 11 green balloons. How many balloons are there in all?
  11. 11.? + 1 = 8
  12. 12.1 + 5 + 2 =
  13. 13.3 + 2 =
  14. 14.There are 6 green balls and 10 blue balls. How many balls are there in all?
  15. 15.There are 8 white balls and 3 red balls. How many balls are there in all?
  16. 16.1 + ? = 9
  17. 17.There are 4 red balls and 14 blue balls. How many balls are there in all?
  18. 18.14 + 4 =
  19. 19.4 + 5 + 1 =
  20. 20.? + 4 = 9
  21. 21.Joseph has 8 balloons and gets 10 balloons more. How many balloons does Joseph have now?
  22. 22.Diya has 10 laddoos and gets 3 laddoos more. How many laddoos does Diya have now?
  23. 23.14 + 3 =
  24. 24.Kavya has 8 kites and gets 7 kites more. How many kites does Kavya have now?
  25. 25.1 + 11 =
  26. 26.3 + 4 + 1 =
  27. 27.There are 2 pink crayons and 12 blue crayons. How many crayons are there in all?
  28. 28.? + 4 = 14
  29. 29.Rahul has 2 laddoos and gets 8 laddoos more. How many laddoos does Rahul have now?
  30. 30.Arjun has 13 bananas and gets 3 bananas more. How many bananas does Arjun have now?
  31. 31.2 + 5 =
  32. 32.15 + 3 =
  33. 33.3 + 1 + 9 =
  34. 34.2 + 6 + 1 =
  35. 35.? + 9 = 14
  36. 36.8 + 8 + 1 =
  37. 37.There are 9 pink beads and 11 yellow beads. How many beads are there in all?
  38. 38.There are 4 green flowers and 16 yellow flowers. How many flowers are there in all?
  39. 39.There are 5 pink crayons and 8 blue crayons. How many crayons are there in all?
  40. 40.Rohan has 12 kites and gets 5 kites more. How many kites does Rohan have now?

Answer key

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

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