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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 815 · 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 + 3 =
  2. 2.7 + 13 =
  3. 3.3 + 7 + 1 =
  4. 4.7 + ? = 10
  5. 5.8 + 4 + 8 =
  6. 6.2 + 4 + 9 =
  7. 7.There are 8 red flowers and 3 green flowers. How many flowers are there in all?
  8. 8.2 + 2 + 9 =
  9. 9.Joseph has 2 laddoos and gets 1 laddoo more. How many laddoos does Joseph have now?
  10. 10.6 + 4 + 3 =
  11. 11.1 + 10 =
  12. 12.There are 12 pink balloons and 7 red balloons. How many balloons are there in all?
  13. 13.There are 4 blue kites and 13 red kites. How many kites are there in all?
  14. 14.3 + ? = 4
  15. 15.6 + 3 + 7 =
  16. 16.There are 5 white beads and 4 green beads. How many beads are there in all?
  17. 17.? + 8 = 16
  18. 18.Aarav has 13 shells and gets 4 shells more. How many shells does Aarav have now?
  19. 19.12 + 2 =
  20. 20.17 + 1 =
  21. 21.8 + ? = 11
  22. 22.There are 8 red beads and 2 green beads. How many beads are there in all?
  23. 23.Rohan has 6 balls and gets 7 balls more. How many balls does Rohan have now?
  24. 24.2 + 4 + 4 =
  25. 25.There are 11 green balloons and 2 white balloons. How many balloons are there in all?
  26. 26.There are 11 yellow beads and 2 red beads. How many beads are there in all?
  27. 27.There are 9 red beads and 4 white beads. How many beads are there in all?
  28. 28.1 + 5 + 5 =
  29. 29.8 + 1 + 1 =
  30. 30.Kavya has 10 bananas and gets 5 bananas more. How many bananas does Kavya have now?
  31. 31.4 + 3 + 4 =
  32. 32.? + 1 = 17
  33. 33.8 + 12 =
  34. 34.6 + 1 + 8 =
  35. 35.There are 4 pink kites and 3 white kites. How many kites are there in all?
  36. 36.1 + 8 + 5 =
  37. 37.Zoya has 5 marbles and gets 8 marbles more. How many marbles does Zoya have now?
  38. 38.Dev has 5 kites and gets 10 kites more. How many kites does Dev have now?
  39. 39.3 + 9 =
  40. 40.14 + 2 =

Answer key

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

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