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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 789 · 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. 1.1 + 2 + 5 =
  2. 2.There are 9 red flowers and 7 blue flowers. How many flowers are there in all?
  3. 3.Riya has 14 pencils and gets 2 pencils more. How many pencils does Riya have now?
  4. 4.There are 10 red flowers and 4 pink flowers. How many flowers are there in all?
  5. 5.9 + ? = 11
  6. 6.Rahul has 7 books and gets 8 books more. How many books does Rahul have now?
  7. 7.? + 15 = 16
  8. 8.Karan has 6 flowers and gets 9 flowers more. How many flowers does Karan have now?
  9. 9.1 + 5 + 4 =
  10. 10.16 + ? = 19
  11. 11.Aarav has 3 shells and gets 5 shells more. How many shells does Aarav have now?
  12. 12.Saanvi has 2 marbles and gets 14 marbles more. How many marbles does Saanvi have now?
  13. 13.2 + ? = 3
  14. 14.5 + 13 =
  15. 15.16 + 4 =
  16. 16.There are 9 white beads and 7 green beads. How many beads are there in all?
  17. 17.13 + 3 =
  18. 18.7 + 4 =
  19. 19.There are 7 green balls and 4 white balls. How many balls are there in all?
  20. 20.8 + 1 =
  21. 21.There are 3 pink flowers and 15 green flowers. How many flowers are there in all?
  22. 22.There are 5 blue balls and 3 green balls. How many balls are there in all?
  23. 23.Rahul has 11 shells and gets 9 shells more. How many shells does Rahul have now?
  24. 24.5 + 4 + 3 =
  25. 25.Meera has 9 books and gets 4 books more. How many books does Meera have now?
  26. 26.? + 6 = 14
  27. 27.Diya has 4 pencils and gets 14 pencils more. How many pencils does Diya have now?
  28. 28.12 + 2 =
  29. 29.10 + 7 =
  30. 30.5 + 3 + 7 =
  31. 31.Manav has 3 flowers and gets 11 flowers more. How many flowers does Manav have now?
  32. 32.2 + 2 + 4 =
  33. 33.18 + 1 =
  34. 34.? + 5 = 19
  35. 35.There are 5 yellow crayons and 10 pink crayons. How many crayons are there in all?
  36. 36.15 + 3 =
  37. 37.Rahul has 6 mangoes and gets 12 mangoes more. How many mangoes does Rahul have now?
  38. 38.? + 2 = 6
  39. 39.There are 12 blue kites and 2 pink kites. How many kites are there in all?
  40. 40.11 + 1 =

Answer key

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

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