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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 671 · 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 3 red beads and 7 green beads. How many beads are there in all?
  2. 2.Sneha has 6 books and gets 10 books more. How many books does Sneha have now?
  3. 3.? + 2 = 5
  4. 4.1 + 12 =
  5. 5.2 + 16 =
  6. 6.Manav has 10 flowers and gets 1 flower more. How many flowers does Manav have now?
  7. 7.3 + 3 + 3 =
  8. 8.There are 4 white beads and 3 red beads. How many beads are there in all?
  9. 9.Rahul has 5 marbles and gets 2 marbles more. How many marbles does Rahul have now?
  10. 10.4 + ? = 12
  11. 11.12 + ? = 19
  12. 12.? + 15 = 16
  13. 13.There are 7 yellow flowers and 8 green flowers. How many flowers are there in all?
  14. 14.2 + 8 =
  15. 15.17 + 2 =
  16. 16.5 + ? = 6
  17. 17.? + 5 = 9
  18. 18.6 + 4 + 1 =
  19. 19.9 + 1 =
  20. 20.1 + 8 + 6 =
  21. 21.There are 9 blue crayons and 8 pink crayons. How many crayons are there in all?
  22. 22.2 + 6 + 2 =
  23. 23.5 + 12 =
  24. 24.8 + 3 + 7 =
  25. 25.8 + 7 + 5 =
  26. 26.Arjun has 2 books and gets 7 books more. How many books does Arjun have now?
  27. 27.7 + 7 + 6 =
  28. 28.1 + 13 =
  29. 29.2 + ? = 11
  30. 30.There are 10 red balls and 3 yellow balls. How many balls are there in all?
  31. 31.Rohan has 12 pencils and gets 3 pencils more. How many pencils does Rohan have now?
  32. 32.There are 2 green balloons and 2 yellow balloons. How many balloons are there in all?
  33. 33.3 + 6 + 11 =
  34. 34.There are 9 blue balloons and 9 green balloons. How many balloons are there in all?
  35. 35.There are 3 blue kites and 6 red kites. How many kites are there in all?
  36. 36.Aditya has 10 balls and gets 4 balls more. How many balls does Aditya have now?
  37. 37.10 + 10 =
  38. 38.? + 1 = 11
  39. 39.1 + 4 + 13 =
  40. 40.There are 7 yellow balloons and 3 blue balloons. How many balloons are there in all?

Answer key

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

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