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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 772 · 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. 1.10 + 5 =
  2. 2.8 + ? = 13
  3. 3.7 + 4 + 4 =
  4. 4.? + 1 = 20
  5. 5.4 + 4 + 1 =
  6. 6.There are 3 blue balls and 16 green balls. How many balls are there in all?
  7. 7.There are 4 green crayons and 8 white crayons. How many crayons are there in all?
  8. 8.There are 9 pink balloons and 5 blue balloons. How many balloons are there in all?
  9. 9.7 + 2 + 10 =
  10. 10.2 + 14 =
  11. 11.2 + ? = 3
  12. 12.3 + 1 + 15 =
  13. 13.Manav has 5 pencils and gets 8 pencils more. How many pencils does Manav have now?
  14. 14.2 + ? = 4
  15. 15.11 + 5 =
  16. 16.17 + 1 =
  17. 17.? + 7 = 8
  18. 18.1 + ? = 9
  19. 19.14 + 5 =
  20. 20.Manav has 2 crayons and gets 4 crayons more. How many crayons does Manav have now?
  21. 21.There are 3 white kites and 15 red kites. How many kites are there in all?
  22. 22.There are 3 white balls and 4 red balls. How many balls are there in all?
  23. 23.6 + 9 =
  24. 24.9 + 3 =
  25. 25.3 + ? = 4
  26. 26.16 + ? = 20
  27. 27.7 + 6 =
  28. 28.3 + ? = 16
  29. 29.There are 9 pink flowers and 2 red flowers. How many flowers are there in all?
  30. 30.? + 5 = 20
  31. 31.8 + 4 + 1 =
  32. 32.There are 10 green balls and 10 blue balls. How many balls are there in all?
  33. 33.12 + 6 =
  34. 34.18 + 1 =
  35. 35.6 + 6 + 3 =
  36. 36.16 + 1 =
  37. 37.8 + 6 + 6 =
  38. 38.4 + 7 =
  39. 39.5 + 3 =
  40. 40.Riya has 11 books and gets 3 books more. How many books does Riya have now?

Answer key

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

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