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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 552 · 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. 1.5 + 3 + 9 =
  2. 2.6 + 3 + 1 =
  3. 3.10 + 2 =
  4. 4.There are 3 green kites and 7 red kites. How many kites are there in all?
  5. 5.5 + 8 + 2 =
  6. 6.2 + 4 =
  7. 7.5 + 1 + 14 =
  8. 8.Dev has 7 balls and gets 8 balls more. How many balls does Dev have now?
  9. 9.There are 7 yellow flowers and 6 blue flowers. How many flowers are there in all?
  10. 10.5 + ? = 20
  11. 11.There are 4 red flowers and 9 blue flowers. How many flowers are there in all?
  12. 12.4 + ? = 14
  13. 13.9 + 10 =
  14. 14.Diya has 13 crayons and gets 2 crayons more. How many crayons does Diya have now?
  15. 15.18 + 1 =
  16. 16.There are 11 white crayons and 8 yellow crayons. How many crayons are there in all?
  17. 17.There are 7 red balloons and 5 green balloons. How many balloons are there in all?
  18. 18.10 + 4 =
  19. 19.15 + 1 =
  20. 20.1 + ? = 3
  21. 21.There are 12 red flowers and 3 pink flowers. How many flowers are there in all?
  22. 22.There are 7 green flowers and 12 yellow flowers. How many flowers are there in all?
  23. 23.7 + 6 + 6 =
  24. 24.4 + 13 =
  25. 25.6 + 6 + 5 =
  26. 26.Tara has 3 mangoes and gets 4 mangoes more. How many mangoes does Tara have now?
  27. 27.6 + 5 + 4 =
  28. 28.3 + ? = 7
  29. 29.7 + 8 + 4 =
  30. 30.There are 11 white flowers and 8 green flowers. How many flowers are there in all?
  31. 31.2 + 6 + 6 =
  32. 32.Pooja has 13 books and gets 1 book more. How many books does Pooja have now?
  33. 33.19 + 1 =
  34. 34.2 + ? = 8
  35. 35.5 + 6 + 9 =
  36. 36.5 + 8 + 5 =
  37. 37.8 + 8 + 3 =
  38. 38.? + 5 = 17
  39. 39.? + 7 = 18
  40. 40.7 + 8 + 5 =

Answer key

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

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