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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 657 · 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. 1.4 + 2 =
  2. 2.? + 3 = 6
  3. 3.There are 2 green balls and 18 blue balls. How many balls are there in all?
  4. 4.? + 11 = 14
  5. 5.3 + 15 =
  6. 6.8 + ? = 12
  7. 7.17 + 1 =
  8. 8.8 + 8 + 2 =
  9. 9.Isha has 12 flowers and gets 7 flowers more. How many flowers does Isha have now?
  10. 10.2 + 1 + 17 =
  11. 11.15 + 4 =
  12. 12.Karan has 12 balls and gets 1 ball more. How many balls does Karan have now?
  13. 13.There are 2 blue balls and 8 yellow balls. How many balls are there in all?
  14. 14.There are 10 green balls and 2 yellow balls. How many balls are there in all?
  15. 15.Isha has 7 crayons and gets 11 crayons more. How many crayons does Isha have now?
  16. 16.11 + 5 =
  17. 17.There are 3 pink balloons and 7 green balloons. How many balloons are there in all?
  18. 18.Manav has 8 pencils and gets 3 pencils more. How many pencils does Manav have now?
  19. 19.5 + 2 + 3 =
  20. 20.There are 9 white crayons and 3 blue crayons. How many crayons are there in all?
  21. 21.Sneha has 8 pencils and gets 8 pencils more. How many pencils does Sneha have now?
  22. 22.2 + 6 + 6 =
  23. 23.7 + 4 + 9 =
  24. 24.14 + 3 =
  25. 25.Arjun has 6 shells and gets 2 shells more. How many shells does Arjun have now?
  26. 26.Gurpreet has 4 books and gets 15 books more. How many books does Gurpreet have now?
  27. 27.15 + 5 =
  28. 28.Priya has 2 pencils and gets 1 pencil more. How many pencils does Priya have now?
  29. 29.There are 6 yellow flowers and 5 green flowers. How many flowers are there in all?
  30. 30.3 + 5 =
  31. 31.5 + 6 + 5 =
  32. 32.There are 8 red kites and 9 blue kites. How many kites are there in all?
  33. 33.7 + 7 + 3 =
  34. 34.16 + ? = 19
  35. 35.There are 9 green balls and 9 white balls. How many balls are there in all?
  36. 36.5 + 7 =
  37. 37.2 + 2 + 3 =
  38. 38.Riya has 2 balloons and gets 7 balloons more. How many balloons does Riya have now?
  39. 39.9 + 2 =
  40. 40.12 + 6 =

Answer key

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

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