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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 345 · 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 + 6 + 10 =
  3. 3.1 + 13 =
  4. 4.? + 5 = 18
  5. 5.13 + 7 =
  6. 6.Manav has 14 mangoes and gets 3 mangoes more. How many mangoes does Manav have now?
  7. 7.7 + 2 + 3 =
  8. 8.There are 7 white balls and 7 pink balls. How many balls are there in all?
  9. 9.Aarav has 15 flowers and gets 4 flowers more. How many flowers does Aarav have now?
  10. 10.6 + ? = 11
  11. 11.8 + 8 + 2 =
  12. 12.There are 11 red kites and 6 yellow kites. How many kites are there in all?
  13. 13.5 + 12 =
  14. 14.3 + 3 + 4 =
  15. 15.Farhan has 15 balls and gets 4 balls more. How many balls does Farhan have now?
  16. 16.Rahul has 5 marbles and gets 1 marble more. How many marbles does Rahul have now?
  17. 17.Ishaan has 6 shells and gets 5 shells more. How many shells does Ishaan have now?
  18. 18.Nisha has 10 balloons and gets 9 balloons more. How many balloons does Nisha have now?
  19. 19.? + 7 = 17
  20. 20.8 + 8 + 3 =
  21. 21.Karan has 9 marbles and gets 9 marbles more. How many marbles does Karan have now?
  22. 22.There are 10 pink beads and 8 yellow beads. How many beads are there in all?
  23. 23.3 + 5 =
  24. 24.Rohan has 8 balls and gets 10 balls more. How many balls does Rohan have now?
  25. 25.6 + 13 =
  26. 26.7 + 7 =
  27. 27.6 + 2 + 6 =
  28. 28.10 + 1 =
  29. 29.? + 4 = 16
  30. 30.6 + 4 + 10 =
  31. 31.Manav has 7 marbles and gets 2 marbles more. How many marbles does Manav have now?
  32. 32.Pooja has 6 marbles and gets 14 marbles more. How many marbles does Pooja have now?
  33. 33.2 + 6 + 11 =
  34. 34.There are 9 blue balloons and 4 yellow balloons. How many balloons are there in all?
  35. 35.14 + 4 =
  36. 36.6 + 5 =
  37. 37.Rahul has 2 laddoos and gets 16 laddoos more. How many laddoos does Rahul have now?
  38. 38.? + 8 = 15
  39. 39.There are 8 pink beads and 2 blue beads. How many beads are there in all?
  40. 40.11 + 6 =

Answer key

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

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