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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 643 · 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. 1.8 + 2 =
  2. 2.3 + 3 =
  3. 3.Rohan has 3 bananas and gets 2 bananas more. How many bananas does Rohan have now?
  4. 4.5 + 4 + 11 =
  5. 5.14 + 5 =
  6. 6.5 + 4 + 6 =
  7. 7.3 + 2 + 12 =
  8. 8.? + 12 = 13
  9. 9.9 + ? = 15
  10. 10.1 + 19 =
  11. 11.There are 8 white beads and 10 blue beads. How many beads are there in all?
  12. 12.10 + ? = 13
  13. 13.There are 2 pink balloons and 18 blue balloons. How many balloons are there in all?
  14. 14.6 + 3 + 9 =
  15. 15.9 + 10 =
  16. 16.Aarav has 6 laddoos and gets 12 laddoos more. How many laddoos does Aarav have now?
  17. 17.2 + 2 + 4 =
  18. 18.3 + 8 + 9 =
  19. 19.8 + 3 + 3 =
  20. 20.? + 9 = 12
  21. 21.3 + 3 + 8 =
  22. 22.1 + 4 + 11 =
  23. 23.There are 9 red flowers and 11 green flowers. How many flowers are there in all?
  24. 24.3 + 1 =
  25. 25.8 + 7 + 2 =
  26. 26.? + 1 = 3
  27. 27.9 + 2 =
  28. 28.12 + 2 =
  29. 29.17 + 2 =
  30. 30.4 + 5 + 9 =
  31. 31.18 + 1 =
  32. 32.6 + 4 + 6 =
  33. 33.15 + 5 =
  34. 34.9 + 4 =
  35. 35.17 + ? = 18
  36. 36.There are 7 red balloons and 6 green balloons. How many balloons are there in all?
  37. 37.Rahul has 13 bananas and gets 6 bananas more. How many bananas does Rahul have now?
  38. 38.? + 8 = 17
  39. 39.5 + 8 + 3 =
  40. 40.Kavya has 5 kites and gets 3 kites more. How many kites does Kavya have now?

Answer key

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

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