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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 369 · 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.Riya has 12 books and gets 4 books more. How many books does Riya have now?
  2. 2.7 + 2 + 3 =
  3. 3.16 + 4 =
  4. 4.There are 9 pink balls and 6 yellow balls. How many balls are there in all?
  5. 5.15 + 4 =
  6. 6.Priya has 11 pencils and gets 2 pencils more. How many pencils does Priya have now?
  7. 7.Gurpreet has 7 crayons and gets 3 crayons more. How many crayons does Gurpreet have now?
  8. 8.8 + 9 =
  9. 9.5 + 3 + 11 =
  10. 10.There are 9 blue balloons and 8 white balloons. How many balloons are there in all?
  11. 11.2 + 7 + 3 =
  12. 12.3 + ? = 13
  13. 13.Joseph has 11 flowers and gets 7 flowers more. How many flowers does Joseph have now?
  14. 14.? + 2 = 10
  15. 15.2 + 2 + 9 =
  16. 16.7 + 3 + 9 =
  17. 17.1 + 1 + 1 =
  18. 18.12 + 7 =
  19. 19.3 + 3 + 7 =
  20. 20.7 + ? = 9
  21. 21.2 + 18 =
  22. 22.Aarav has 12 balloons and gets 6 balloons more. How many balloons does Aarav have now?
  23. 23.7 + 1 + 9 =
  24. 24.14 + 1 =
  25. 25.3 + 6 + 8 =
  26. 26.? + 11 = 16
  27. 27.There are 6 pink kites and 7 white kites. How many kites are there in all?
  28. 28.Aarav has 11 crayons and gets 9 crayons more. How many crayons does Aarav have now?
  29. 29.There are 6 blue kites and 7 white kites. How many kites are there in all?
  30. 30.7 + 13 =
  31. 31.4 + ? = 14
  32. 32.Zoya has 5 pencils and gets 8 pencils more. How many pencils does Zoya have now?
  33. 33.There are 6 yellow flowers and 4 blue flowers. How many flowers are there in all?
  34. 34.6 + 2 + 7 =
  35. 35.3 + 6 + 10 =
  36. 36.There are 3 yellow flowers and 16 blue flowers. How many flowers are there in all?
  37. 37.11 + 3 =
  38. 38.5 + 6 + 6 =
  39. 39.1 + 2 + 17 =
  40. 40.9 + 5 =

Answer key

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

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