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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 246 · 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. 1.6 + ? = 12
  2. 2.1 + 3 + 12 =
  3. 3.Nisha has 7 balls and gets 10 balls more. How many balls does Nisha have now?
  4. 4.There are 9 white kites and 2 blue kites. How many kites are there in all?
  5. 5.Meera has 5 mangoes and gets 1 mango more. How many mangoes does Meera have now?
  6. 6.Rahul has 9 bananas and gets 4 bananas more. How many bananas does Rahul have now?
  7. 7.? + 5 = 13
  8. 8.12 + 8 =
  9. 9.4 + 2 =
  10. 10.? + 3 = 8
  11. 11.? + 1 = 5
  12. 12.5 + 2 + 12 =
  13. 13.Saanvi has 12 mangoes and gets 6 mangoes more. How many mangoes does Saanvi have now?
  14. 14.18 + 1 =
  15. 15.3 + 12 =
  16. 16.7 + 1 + 6 =
  17. 17.8 + 2 + 9 =
  18. 18.4 + 12 =
  19. 19.? + 10 = 16
  20. 20.There are 12 blue balloons and 5 red balloons. How many balloons are there in all?
  21. 21.Isha has 10 books and gets 8 books more. How many books does Isha have now?
  22. 22.1 + ? = 9
  23. 23.3 + ? = 16
  24. 24.5 + 1 =
  25. 25.1 + ? = 16
  26. 26.Saanvi has 12 pencils and gets 4 pencils more. How many pencils does Saanvi have now?
  27. 27.Rahul has 15 marbles and gets 3 marbles more. How many marbles does Rahul have now?
  28. 28.There are 10 red crayons and 3 yellow crayons. How many crayons are there in all?
  29. 29.There are 2 yellow flowers and 5 white flowers. How many flowers are there in all?
  30. 30.There are 8 yellow balloons and 4 blue balloons. How many balloons are there in all?
  31. 31.There are 7 green flowers and 2 pink flowers. How many flowers are there in all?
  32. 32.3 + 11 =
  33. 33.Aarav has 6 pencils and gets 13 pencils more. How many pencils does Aarav have now?
  34. 34.19 + 1 =
  35. 35.4 + ? = 9
  36. 36.There are 7 yellow kites and 11 pink kites. How many kites are there in all?
  37. 37.? + 7 = 19
  38. 38.1 + ? = 13
  39. 39.5 + 2 + 6 =
  40. 40.? + 7 = 20

Answer key

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

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