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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 640 · 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.There are 10 blue flowers and 5 yellow flowers. How many flowers are there in all?
  2. 2.11 + ? = 16
  3. 3.Rohan has 11 balls and gets 5 balls more. How many balls does Rohan have now?
  4. 4.11 + 1 =
  5. 5.Isha has 2 books and gets 5 books more. How many books does Isha have now?
  6. 6.5 + 7 + 1 =
  7. 7.14 + 6 =
  8. 8.17 + 2 =
  9. 9.Isha has 7 pencils and gets 10 pencils more. How many pencils does Isha have now?
  10. 10.Zoya has 8 marbles and gets 4 marbles more. How many marbles does Zoya have now?
  11. 11.3 + 4 + 1 =
  12. 12.? + 11 = 12
  13. 13.17 + 1 =
  14. 14.13 + 7 =
  15. 15.Arjun has 6 laddoos and gets 6 laddoos more. How many laddoos does Arjun have now?
  16. 16.There are 12 green balloons and 7 blue balloons. How many balloons are there in all?
  17. 17.2 + ? = 5
  18. 18.14 + 4 =
  19. 19.Farhan has 2 laddoos and gets 18 laddoos more. How many laddoos does Farhan have now?
  20. 20.? + 4 = 6
  21. 21.? + 2 = 6
  22. 22.Gurpreet has 6 pencils and gets 11 pencils more. How many pencils does Gurpreet have now?
  23. 23.1 + ? = 6
  24. 24.? + 1 = 4
  25. 25.3 + 4 + 2 =
  26. 26.5 + ? = 18
  27. 27.1 + 11 =
  28. 28.4 + ? = 15
  29. 29.19 + 1 =
  30. 30.1 + 5 + 7 =
  31. 31.There are 9 green balloons and 2 pink balloons. How many balloons are there in all?
  32. 32.11 + 2 =
  33. 33.1 + 9 =
  34. 34.8 + 4 + 3 =
  35. 35.There are 2 blue balloons and 4 yellow balloons. How many balloons are there in all?
  36. 36.? + 3 = 6
  37. 37.3 + 2 =
  38. 38.Ananya has 14 balloons and gets 1 balloon more. How many balloons does Ananya have now?
  39. 39.7 + 4 + 1 =
  40. 40.There are 2 white flowers and 3 red flowers. How many flowers are there in all?

Answer key

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

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