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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 401 · 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. 1.12 + 6 =
  2. 2.1 + 1 + 7 =
  3. 3.? + 7 = 17
  4. 4.2 + 1 + 2 =
  5. 5.? + 14 = 19
  6. 6.10 + 8 =
  7. 7.7 + 13 =
  8. 8.There are 3 yellow crayons and 5 pink crayons. How many crayons are there in all?
  9. 9.There are 9 white beads and 2 green beads. How many beads are there in all?
  10. 10.2 + 1 =
  11. 11.Farhan has 3 flowers and gets 5 flowers more. How many flowers does Farhan have now?
  12. 12.Vivaan has 15 balls and gets 5 balls more. How many balls does Vivaan have now?
  13. 13.13 + ? = 19
  14. 14.6 + 6 + 5 =
  15. 15.15 + 5 =
  16. 16.6 + 2 =
  17. 17.1 + ? = 7
  18. 18.2 + 1 + 12 =
  19. 19.Vivaan has 5 mangoes and gets 1 mango more. How many mangoes does Vivaan have now?
  20. 20.3 + ? = 10
  21. 21.There are 12 red flowers and 7 green flowers. How many flowers are there in all?
  22. 22.Tara has 7 kites and gets 5 kites more. How many kites does Tara have now?
  23. 23.There are 11 blue crayons and 4 yellow crayons. How many crayons are there in all?
  24. 24.1 + 4 + 9 =
  25. 25.There are 4 white beads and 14 red beads. How many beads are there in all?
  26. 26.8 + 6 =
  27. 27.Zoya has 15 balls and gets 5 balls more. How many balls does Zoya have now?
  28. 28.Gurpreet has 11 bananas and gets 6 bananas more. How many bananas does Gurpreet have now?
  29. 29.14 + 5 =
  30. 30.2 + ? = 5
  31. 31.7 + 12 =
  32. 32.1 + 3 + 1 =
  33. 33.7 + 8 + 2 =
  34. 34.Rohan has 4 books and gets 5 books more. How many books does Rohan have now?
  35. 35.? + 7 = 13
  36. 36.2 + 2 + 3 =
  37. 37.There are 2 green flowers and 8 blue flowers. How many flowers are there in all?
  38. 38.3 + 3 + 4 =
  39. 39.16 + 3 =
  40. 40.10 + 4 =

Answer key

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

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