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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 18 · 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 3 blue beads and 14 white beads. How many beads are there in all?
  2. 2.Rahul has 4 flowers and gets 4 flowers more. How many flowers does Rahul have now?
  3. 3.? + 8 = 11
  4. 4.13 + 4 =
  5. 5.Priya has 11 balloons and gets 6 balloons more. How many balloons does Priya have now?
  6. 6.There are 11 pink flowers and 2 white flowers. How many flowers are there in all?
  7. 7.7 + ? = 19
  8. 8.Joseph has 5 bananas and gets 4 bananas more. How many bananas does Joseph have now?
  9. 9.16 + 4 =
  10. 10.Saanvi has 8 bananas and gets 5 bananas more. How many bananas does Saanvi have now?
  11. 11.There are 7 red flowers and 2 white flowers. How many flowers are there in all?
  12. 12.11 + 5 =
  13. 13.1 + 1 + 7 =
  14. 14.There are 3 red balloons and 9 green balloons. How many balloons are there in all?
  15. 15.5 + ? = 15
  16. 16.Kavya has 6 balloons and gets 5 balloons more. How many balloons does Kavya have now?
  17. 17.3 + 7 + 6 =
  18. 18.15 + ? = 20
  19. 19.14 + 2 =
  20. 20.? + 3 = 5
  21. 21.2 + 3 + 12 =
  22. 22.There are 7 white crayons and 8 red crayons. How many crayons are there in all?
  23. 23.Karan has 3 books and gets 5 books more. How many books does Karan have now?
  24. 24.Saanvi has 15 flowers and gets 3 flowers more. How many flowers does Saanvi have now?
  25. 25.Priya has 12 shells and gets 6 shells more. How many shells does Priya have now?
  26. 26.Karan has 3 crayons and gets 10 crayons more. How many crayons does Karan have now?
  27. 27.Saanvi has 8 flowers and gets 11 flowers more. How many flowers does Saanvi have now?
  28. 28.There are 6 red balloons and 11 green balloons. How many balloons are there in all?
  29. 29.Meera has 2 pencils and gets 12 pencils more. How many pencils does Meera have now?
  30. 30.There are 11 pink flowers and 5 green flowers. How many flowers are there in all?
  31. 31.3 + 7 + 9 =
  32. 32.2 + ? = 10
  33. 33.8 + 1 + 10 =
  34. 34.13 + 2 =
  35. 35.? + 14 = 20
  36. 36.There are 8 pink beads and 8 green beads. How many beads are there in all?
  37. 37.12 + 5 =
  38. 38.Manav has 10 bananas and gets 3 bananas more. How many bananas does Manav have now?
  39. 39.3 + 3 + 10 =
  40. 40.? + 5 = 6

Answer key

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

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