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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 659 · 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 + 1 =
  2. 2.3 + 2 + 2 =
  3. 3.6 + 5 + 6 =
  4. 4.8 + 8 + 4 =
  5. 5.There are 7 red balls and 12 pink balls. How many balls are there in all?
  6. 6.14 + 1 =
  7. 7.18 + 1 =
  8. 8.12 + 6 =
  9. 9.15 + 2 =
  10. 10.3 + 5 =
  11. 11.3 + ? = 10
  12. 12.1 + ? = 7
  13. 13.19 + 1 =
  14. 14.1 + ? = 13
  15. 15.Riya has 14 bananas and gets 5 bananas more. How many bananas does Riya have now?
  16. 16.17 + 1 =
  17. 17.10 + 3 =
  18. 18.There are 11 yellow balloons and 4 pink balloons. How many balloons are there in all?
  19. 19.14 + 5 =
  20. 20.2 + 1 + 16 =
  21. 21.1 + 13 =
  22. 22.2 + 2 =
  23. 23.Meera has 12 marbles and gets 2 marbles more. How many marbles does Meera have now?
  24. 24.4 + 4 =
  25. 25.19 + ? = 20
  26. 26.Gurpreet has 9 pencils and gets 5 pencils more. How many pencils does Gurpreet have now?
  27. 27.1 + 6 + 3 =
  28. 28.Aarav has 2 bananas and gets 4 bananas more. How many bananas does Aarav have now?
  29. 29.Ananya has 2 books and gets 11 books more. How many books does Ananya have now?
  30. 30.Kabir has 3 crayons and gets 10 crayons more. How many crayons does Kabir have now?
  31. 31.12 + ? = 14
  32. 32.6 + 3 + 9 =
  33. 33.? + 3 = 16
  34. 34.5 + 4 + 8 =
  35. 35.? + 3 = 11
  36. 36.18 + 2 =
  37. 37.6 + 1 + 1 =
  38. 38.13 + 4 =
  39. 39.There are 8 pink crayons and 5 red crayons. How many crayons are there in all?
  40. 40.Meera has 13 flowers and gets 7 flowers more. How many flowers does Meera have now?

Answer key

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

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