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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 153 · 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 11 red balls and 9 blue balls. How many balls are there in all?
  2. 2.? + 5 = 20
  3. 3.4 + 16 =
  4. 4.12 + 8 =
  5. 5.2 + 5 =
  6. 6.2 + 4 + 5 =
  7. 7.There are 7 pink balls and 12 blue balls. How many balls are there in all?
  8. 8.14 + 4 =
  9. 9.4 + 11 =
  10. 10.Lakshmi has 9 balls and gets 10 balls more. How many balls does Lakshmi have now?
  11. 11.13 + 5 =
  12. 12.There are 5 red balls and 12 white balls. How many balls are there in all?
  13. 13.2 + ? = 11
  14. 14.Isha has 10 flowers and gets 8 flowers more. How many flowers does Isha have now?
  15. 15.There are 8 green flowers and 3 yellow flowers. How many flowers are there in all?
  16. 16.1 + 1 =
  17. 17.? + 4 = 5
  18. 18.5 + 7 + 1 =
  19. 19.There are 10 blue balls and 10 green balls. How many balls are there in all?
  20. 20.6 + 14 =
  21. 21.Riya has 12 mangoes and gets 8 mangoes more. How many mangoes does Riya have now?
  22. 22.There are 10 pink balls and 2 yellow balls. How many balls are there in all?
  23. 23.There are 10 pink balloons and 8 green balloons. How many balloons are there in all?
  24. 24.Pooja has 4 bananas and gets 11 bananas more. How many bananas does Pooja have now?
  25. 25.? + 1 = 8
  26. 26.? + 3 = 4
  27. 27.Farhan has 11 marbles and gets 3 marbles more. How many marbles does Farhan have now?
  28. 28.There are 4 white flowers and 4 yellow flowers. How many flowers are there in all?
  29. 29.Pooja has 6 kites and gets 7 kites more. How many kites does Pooja have now?
  30. 30.Rahul has 8 books and gets 7 books more. How many books does Rahul have now?
  31. 31.There are 9 blue kites and 4 red kites. How many kites are there in all?
  32. 32.There are 11 pink flowers and 9 white flowers. How many flowers are there in all?
  33. 33.Nisha has 4 laddoos and gets 10 laddoos more. How many laddoos does Nisha have now?
  34. 34.? + 4 = 19
  35. 35.There are 10 blue crayons and 6 red crayons. How many crayons are there in all?
  36. 36.18 + 1 =
  37. 37.There are 6 yellow crayons and 2 green crayons. How many crayons are there in all?
  38. 38.6 + 6 + 4 =
  39. 39.7 + 4 + 8 =
  40. 40.1 + 2 + 7 =

Answer key

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

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