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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 431 · 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. 1.1 + 4 + 7 =
  2. 2.Pooja has 7 bananas and gets 5 bananas more. How many bananas does Pooja have now?
  3. 3.17 + 1 =
  4. 4.9 + 9 =
  5. 5.9 + ? = 12
  6. 6.5 + ? = 20
  7. 7.There are 9 white crayons and 7 blue crayons. How many crayons are there in all?
  8. 8.1 + ? = 15
  9. 9.? + 4 = 7
  10. 10.Isha has 7 balls and gets 2 balls more. How many balls does Isha have now?
  11. 11.There are 4 red balloons and 6 white balloons. How many balloons are there in all?
  12. 12.There are 8 white kites and 3 blue kites. How many kites are there in all?
  13. 13.1 + 4 + 15 =
  14. 14.10 + ? = 20
  15. 15.? + 1 = 11
  16. 16.7 + 2 + 3 =
  17. 17.5 + 14 =
  18. 18.? + 2 = 7
  19. 19.? + 3 = 5
  20. 20.Dev has 14 books and gets 2 books more. How many books does Dev have now?
  21. 21.Arjun has 8 shells and gets 6 shells more. How many shells does Arjun have now?
  22. 22.3 + 3 =
  23. 23.Kavya has 2 bananas and gets 7 bananas more. How many bananas does Kavya have now?
  24. 24.4 + 8 =
  25. 25.2 + ? = 9
  26. 26.? + 5 = 6
  27. 27.Joseph has 9 balls and gets 6 balls more. How many balls does Joseph have now?
  28. 28.? + 4 = 6
  29. 29.Karan has 3 flowers and gets 15 flowers more. How many flowers does Karan have now?
  30. 30.There are 10 blue kites and 8 yellow kites. How many kites are there in all?
  31. 31.8 + 8 =
  32. 32.3 + 2 + 9 =
  33. 33.? + 10 = 19
  34. 34.? + 6 = 9
  35. 35.7 + 5 =
  36. 36.Joseph has 14 marbles and gets 1 marble more. How many marbles does Joseph have now?
  37. 37.5 + 9 =
  38. 38.5 + 1 + 9 =
  39. 39.? + 7 = 10
  40. 40.? + 1 = 5

Answer key

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

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