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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 735 · 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. 1.2 + 1 + 12 =
  2. 2.7 + 4 + 8 =
  3. 3.6 + 1 + 3 =
  4. 4.6 + 3 =
  5. 5.12 + 3 =
  6. 6.There are 9 yellow balloons and 5 pink balloons. How many balloons are there in all?
  7. 7.? + 7 = 8
  8. 8.? + 10 = 11
  9. 9.7 + 6 + 4 =
  10. 10.? + 1 = 14
  11. 11.8 + 3 + 2 =
  12. 12.16 + 1 =
  13. 13.1 + 8 + 11 =
  14. 14.Aarav has 10 pencils and gets 3 pencils more. How many pencils does Aarav have now?
  15. 15.Isha has 15 marbles and gets 1 marble more. How many marbles does Isha have now?
  16. 16.There are 6 blue beads and 2 green beads. How many beads are there in all?
  17. 17.? + 3 = 6
  18. 18.1 + 1 + 13 =
  19. 19.Diya has 2 kites and gets 5 kites more. How many kites does Diya have now?
  20. 20.1 + 5 + 7 =
  21. 21.There are 5 yellow beads and 3 white beads. How many beads are there in all?
  22. 22.3 + 2 =
  23. 23.2 + ? = 14
  24. 24.Rahul has 10 laddoos and gets 3 laddoos more. How many laddoos does Rahul have now?
  25. 25.8 + 7 =
  26. 26.15 + 1 =
  27. 27.12 + 8 =
  28. 28.5 + 2 =
  29. 29.12 + 5 =
  30. 30.3 + ? = 13
  31. 31.3 + 7 + 4 =
  32. 32.17 + 2 =
  33. 33.4 + 3 + 2 =
  34. 34.5 + 8 + 1 =
  35. 35.1 + 18 =
  36. 36.15 + 5 =
  37. 37.Arjun has 11 kites and gets 5 kites more. How many kites does Arjun have now?
  38. 38.9 + 9 =
  39. 39.Ananya has 4 pencils and gets 13 pencils more. How many pencils does Ananya have now?
  40. 40.9 + 10 =

Answer key

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

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