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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 133 · 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. 1.19 + 1 =
  2. 2.3 + 7 + 10 =
  3. 3.6 + 1 + 4 =
  4. 4.Saanvi has 3 kites and gets 7 kites more. How many kites does Saanvi have now?
  5. 5.? + 2 = 7
  6. 6.8 + 8 + 3 =
  7. 7.5 + 6 + 8 =
  8. 8.Diya has 5 laddoos and gets 13 laddoos more. How many laddoos does Diya have now?
  9. 9.Manav has 2 laddoos and gets 14 laddoos more. How many laddoos does Manav have now?
  10. 10.5 + 13 =
  11. 11.9 + 3 =
  12. 12.12 + 1 =
  13. 13.Kavya has 9 balloons and gets 1 balloon more. How many balloons does Kavya have now?
  14. 14.10 + 7 =
  15. 15.5 + 3 + 11 =
  16. 16.There are 10 yellow beads and 3 red beads. How many beads are there in all?
  17. 17.7 + 6 =
  18. 18.16 + 4 =
  19. 19.2 + 8 + 6 =
  20. 20.? + 1 = 3
  21. 21.5 + 11 =
  22. 22.6 + 7 + 1 =
  23. 23.Rohan has 13 balloons and gets 6 balloons more. How many balloons does Rohan have now?
  24. 24.9 + 1 =
  25. 25.17 + 2 =
  26. 26.There are 12 white crayons and 4 yellow crayons. How many crayons are there in all?
  27. 27.? + 6 = 17
  28. 28.5 + 8 + 1 =
  29. 29.? + 5 = 13
  30. 30.1 + 1 + 11 =
  31. 31.Aditya has 9 flowers and gets 8 flowers more. How many flowers does Aditya have now?
  32. 32.10 + 8 =
  33. 33.18 + 2 =
  34. 34.8 + 5 + 4 =
  35. 35.? + 1 = 6
  36. 36.1 + 2 =
  37. 37.Saanvi has 4 pencils and gets 13 pencils more. How many pencils does Saanvi have now?
  38. 38.Meera has 4 pencils and gets 9 pencils more. How many pencils does Meera have now?
  39. 39.1 + 4 + 11 =
  40. 40.? + 8 = 15

Answer key

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

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