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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 434 · 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. 1.7 + ? = 16
  2. 2.Vivaan has 9 bananas and gets 10 bananas more. How many bananas does Vivaan have now?
  3. 3.5 + 7 + 4 =
  4. 4.1 + 2 + 15 =
  5. 5.4 + 4 + 2 =
  6. 6.16 + 4 =
  7. 7.Arjun has 12 books and gets 4 books more. How many books does Arjun have now?
  8. 8.3 + ? = 5
  9. 9.There are 8 blue flowers and 11 pink flowers. How many flowers are there in all?
  10. 10.There are 5 pink crayons and 5 blue crayons. How many crayons are there in all?
  11. 11.Joseph has 14 laddoos and gets 1 laddoo more. How many laddoos does Joseph have now?
  12. 12.There are 9 red balloons and 8 green balloons. How many balloons are there in all?
  13. 13.There are 8 red balls and 11 pink balls. How many balls are there in all?
  14. 14.? + 10 = 15
  15. 15.13 + 6 =
  16. 16.2 + 7 + 8 =
  17. 17.? + 2 = 7
  18. 18.Sneha has 8 bananas and gets 8 bananas more. How many bananas does Sneha have now?
  19. 19.12 + 7 =
  20. 20.There are 12 blue balls and 3 green balls. How many balls are there in all?
  21. 21.2 + 2 + 3 =
  22. 22.9 + 1 =
  23. 23.1 + 5 + 12 =
  24. 24.? + 3 = 13
  25. 25.4 + 2 + 13 =
  26. 26.8 + 12 =
  27. 27.5 + 11 =
  28. 28.Manav has 9 mangoes and gets 1 mango more. How many mangoes does Manav have now?
  29. 29.4 + 2 + 2 =
  30. 30.There are 10 pink beads and 3 white beads. How many beads are there in all?
  31. 31.12 + 5 =
  32. 32.12 + 4 =
  33. 33.? + 2 = 4
  34. 34.5 + 5 + 9 =
  35. 35.There are 9 red beads and 11 blue beads. How many beads are there in all?
  36. 36.? + 4 = 9
  37. 37.Joseph has 5 pencils and gets 11 pencils more. How many pencils does Joseph have now?
  38. 38.There are 6 red crayons and 12 pink crayons. How many crayons are there in all?
  39. 39.8 + 5 + 3 =
  40. 40.There are 7 green flowers and 7 red flowers. How many flowers are there in all?

Answer key

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

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