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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 915 · 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.? + 6 = 11
  2. 2.1 + 2 + 14 =
  3. 3.16 + 1 =
  4. 4.1 + 2 + 10 =
  5. 5.16 + 2 =
  6. 6.2 + 4 + 9 =
  7. 7.7 + 3 + 7 =
  8. 8.7 + 7 =
  9. 9.4 + 16 =
  10. 10.There are 3 white kites and 10 pink kites. How many kites are there in all?
  11. 11.There are 12 pink beads and 2 green beads. How many beads are there in all?
  12. 12.? + 1 = 3
  13. 13.8 + 6 + 4 =
  14. 14.There are 4 green flowers and 3 blue flowers. How many flowers are there in all?
  15. 15.6 + 8 + 3 =
  16. 16.Nisha has 13 bananas and gets 6 bananas more. How many bananas does Nisha have now?
  17. 17.Vivaan has 11 books and gets 5 books more. How many books does Vivaan have now?
  18. 18.2 + 4 + 3 =
  19. 19.2 + ? = 4
  20. 20.4 + ? = 11
  21. 21.2 + 11 =
  22. 22.There are 9 yellow balloons and 8 red balloons. How many balloons are there in all?
  23. 23.5 + 13 =
  24. 24.3 + 7 + 3 =
  25. 25.There are 2 pink balloons and 8 white balloons. How many balloons are there in all?
  26. 26.There are 12 red flowers and 3 white flowers. How many flowers are there in all?
  27. 27.Aditya has 3 books and gets 3 books more. How many books does Aditya have now?
  28. 28.There are 11 blue kites and 3 red kites. How many kites are there in all?
  29. 29.7 + 12 =
  30. 30.8 + 6 =
  31. 31.1 + 8 + 3 =
  32. 32.There are 12 white balloons and 5 yellow balloons. How many balloons are there in all?
  33. 33.There are 3 blue flowers and 11 pink flowers. How many flowers are there in all?
  34. 34.11 + 3 =
  35. 35.2 + 1 + 15 =
  36. 36.? + 3 = 10
  37. 37.There are 6 yellow crayons and 3 green crayons. How many crayons are there in all?
  38. 38.Meera has 14 books and gets 4 books more. How many books does Meera have now?
  39. 39.1 + 6 + 4 =
  40. 40.15 + 2 =

Answer key

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

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