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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 681 · 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. 1.3 + 4 + 12 =
  2. 2.10 + ? = 11
  3. 3.3 + ? = 17
  4. 4.16 + 1 =
  5. 5.? + 14 = 19
  6. 6.6 + 1 =
  7. 7.5 + 4 + 6 =
  8. 8.2 + 3 + 2 =
  9. 9.2 + 4 + 14 =
  10. 10.There are 12 blue flowers and 7 green flowers. How many flowers are there in all?
  11. 11.There are 11 green crayons and 7 red crayons. How many crayons are there in all?
  12. 12.3 + ? = 5
  13. 13.Priya has 3 pencils and gets 2 pencils more. How many pencils does Priya have now?
  14. 14.1 + 2 + 3 =
  15. 15.6 + ? = 10
  16. 16.4 + 1 =
  17. 17.6 + 2 + 12 =
  18. 18.? + 6 = 7
  19. 19.6 + ? = 20
  20. 20.Manav has 4 crayons and gets 9 crayons more. How many crayons does Manav have now?
  21. 21.4 + 11 =
  22. 22.17 + 3 =
  23. 23.? + 13 = 16
  24. 24.19 + 1 =
  25. 25.There are 9 white kites and 10 blue kites. How many kites are there in all?
  26. 26.Meera has 14 balls and gets 4 balls more. How many balls does Meera have now?
  27. 27.Zoya has 4 bananas and gets 14 bananas more. How many bananas does Zoya have now?
  28. 28.13 + 4 =
  29. 29.3 + 17 =
  30. 30.? + 1 = 11
  31. 31.There are 7 white crayons and 8 green crayons. How many crayons are there in all?
  32. 32.There are 2 blue flowers and 15 white flowers. How many flowers are there in all?
  33. 33.3 + 5 =
  34. 34.4 + 10 =
  35. 35.6 + ? = 12
  36. 36.3 + ? = 13
  37. 37.Karan has 10 bananas and gets 1 banana more. How many bananas does Karan have now?
  38. 38.1 + ? = 5
  39. 39.8 + 6 + 6 =
  40. 40.2 + 18 =

Answer key

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

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