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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 139 · 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 + 10 =
  2. 2.There are 9 blue kites and 11 yellow kites. How many kites are there in all?
  3. 3.7 + 5 + 1 =
  4. 4.There are 9 red balloons and 10 blue balloons. How many balloons are there in all?
  5. 5.7 + 8 + 5 =
  6. 6.7 + 2 + 9 =
  7. 7.2 + ? = 13
  8. 8.There are 7 green flowers and 4 pink flowers. How many flowers are there in all?
  9. 9.3 + 3 + 3 =
  10. 10.Pooja has 11 bananas and gets 1 banana more. How many bananas does Pooja have now?
  11. 11.There are 3 white kites and 12 red kites. How many kites are there in all?
  12. 12.? + 7 = 20
  13. 13.6 + 5 + 2 =
  14. 14.4 + 7 + 2 =
  15. 15.There are 10 red balloons and 2 pink balloons. How many balloons are there in all?
  16. 16.? + 1 = 3
  17. 17.7 + 1 =
  18. 18.Meera has 13 books and gets 4 books more. How many books does Meera have now?
  19. 19.There are 9 green beads and 11 white beads. How many beads are there in all?
  20. 20.Kavya has 3 mangoes and gets 13 mangoes more. How many mangoes does Kavya have now?
  21. 21.There are 4 blue balloons and 3 white balloons. How many balloons are there in all?
  22. 22.Manav has 9 books and gets 7 books more. How many books does Manav have now?
  23. 23.? + 3 = 8
  24. 24.There are 4 white kites and 15 blue kites. How many kites are there in all?
  25. 25.There are 7 green crayons and 2 yellow crayons. How many crayons are there in all?
  26. 26.Saanvi has 13 balloons and gets 2 balloons more. How many balloons does Saanvi have now?
  27. 27.5 + 2 + 10 =
  28. 28.5 + 10 =
  29. 29.There are 4 pink flowers and 11 yellow flowers. How many flowers are there in all?
  30. 30.2 + 1 + 4 =
  31. 31.There are 5 red crayons and 14 yellow crayons. How many crayons are there in all?
  32. 32.Farhan has 2 pencils and gets 3 pencils more. How many pencils does Farhan have now?
  33. 33.5 + 3 =
  34. 34.Ishaan has 11 mangoes and gets 1 mango more. How many mangoes does Ishaan have now?
  35. 35.1 + 7 =
  36. 36.3 + 1 =
  37. 37.6 + 3 + 10 =
  38. 38.4 + 4 + 7 =
  39. 39.8 + 4 =
  40. 40.? + 5 = 10

Answer key

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

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