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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 413 · 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. 1.17 + ? = 19
  2. 2.7 + 7 + 2 =
  3. 3.Farhan has 13 mangoes and gets 2 mangoes more. How many mangoes does Farhan have now?
  4. 4.There are 7 white flowers and 5 pink flowers. How many flowers are there in all?
  5. 5.? + 1 = 8
  6. 6.Meera has 15 laddoos and gets 4 laddoos more. How many laddoos does Meera have now?
  7. 7.4 + ? = 11
  8. 8.2 + 2 + 2 =
  9. 9.There are 4 green balloons and 7 red balloons. How many balloons are there in all?
  10. 10.8 + 11 =
  11. 11.7 + 8 =
  12. 12.8 + 5 + 6 =
  13. 13.Ananya has 15 balls and gets 5 balls more. How many balls does Ananya have now?
  14. 14.3 + 13 =
  15. 15.19 + 1 =
  16. 16.8 + 5 =
  17. 17.6 + 7 =
  18. 18.4 + 2 + 11 =
  19. 19.Pooja has 13 kites and gets 5 kites more. How many kites does Pooja have now?
  20. 20.? + 5 = 7
  21. 21.Pooja has 15 crayons and gets 5 crayons more. How many crayons does Pooja have now?
  22. 22.8 + 2 + 1 =
  23. 23.There are 6 white crayons and 11 blue crayons. How many crayons are there in all?
  24. 24.Rohan has 9 crayons and gets 3 crayons more. How many crayons does Rohan have now?
  25. 25.2 + ? = 13
  26. 26.2 + 15 =
  27. 27.There are 7 white balloons and 6 pink balloons. How many balloons are there in all?
  28. 28.1 + 6 + 4 =
  29. 29.5 + ? = 11
  30. 30.1 + 2 + 13 =
  31. 31.3 + ? = 7
  32. 32.1 + 3 + 1 =
  33. 33.15 + 1 =
  34. 34.14 + 1 =
  35. 35.3 + 12 =
  36. 36.3 + 1 =
  37. 37.? + 5 = 6
  38. 38.There are 4 blue kites and 16 red kites. How many kites are there in all?
  39. 39.Isha has 11 marbles and gets 3 marbles more. How many marbles does Isha have now?
  40. 40.4 + 10 =

Answer key

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

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