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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 428 · 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.There are 5 white kites and 15 yellow kites. How many kites are there in all?
  2. 2.8 + 2 =
  3. 3.? + 5 = 17
  4. 4.There are 11 yellow kites and 3 red kites. How many kites are there in all?
  5. 5.There are 2 pink crayons and 5 green crayons. How many crayons are there in all?
  6. 6.16 + 1 =
  7. 7.10 + 2 =
  8. 8.5 + 8 + 5 =
  9. 9.15 + 3 =
  10. 10.Kabir has 11 pencils and gets 3 pencils more. How many pencils does Kabir have now?
  11. 11.3 + 1 + 3 =
  12. 12.8 + ? = 15
  13. 13.11 + 8 =
  14. 14.Tara has 10 mangoes and gets 6 mangoes more. How many mangoes does Tara have now?
  15. 15.Nisha has 3 flowers and gets 2 flowers more. How many flowers does Nisha have now?
  16. 16.Dev has 12 kites and gets 3 kites more. How many kites does Dev have now?
  17. 17.5 + 1 + 1 =
  18. 18.11 + ? = 20
  19. 19.3 + 5 =
  20. 20.6 + ? = 18
  21. 21.Diya has 14 flowers and gets 3 flowers more. How many flowers does Diya have now?
  22. 22.? + 2 = 5
  23. 23.7 + 8 + 1 =
  24. 24.7 + 2 + 10 =
  25. 25.13 + ? = 20
  26. 26.5 + 9 =
  27. 27.5 + 12 =
  28. 28.1 + 1 + 16 =
  29. 29.1 + ? = 5
  30. 30.5 + 13 =
  31. 31.7 + 2 + 9 =
  32. 32.5 + 3 =
  33. 33.3 + 7 + 3 =
  34. 34.Diya has 12 mangoes and gets 6 mangoes more. How many mangoes does Diya have now?
  35. 35.Lakshmi has 8 bananas and gets 7 bananas more. How many bananas does Lakshmi have now?
  36. 36.14 + ? = 20
  37. 37.1 + ? = 3
  38. 38.Pooja has 13 kites and gets 2 kites more. How many kites does Pooja have now?
  39. 39.Meera has 2 mangoes and gets 8 mangoes more. How many mangoes does Meera have now?
  40. 40.2 + 4 + 9 =

Answer key

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

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