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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 25 · 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 10 red crayons and 2 pink crayons. How many crayons are there in all?
  2. 2.13 + ? = 19
  3. 3.There are 2 pink flowers and 18 red flowers. How many flowers are there in all?
  4. 4.1 + 18 =
  5. 5.There are 9 yellow flowers and 4 green flowers. How many flowers are there in all?
  6. 6.? + 2 = 12
  7. 7.4 + 11 =
  8. 8.? + 2 = 10
  9. 9.6 + 10 =
  10. 10.2 + ? = 4
  11. 11.18 + ? = 20
  12. 12.13 + 3 =
  13. 13.There are 5 yellow kites and 13 pink kites. How many kites are there in all?
  14. 14.1 + 5 + 4 =
  15. 15.1 + ? = 17
  16. 16.16 + 1 =
  17. 17.There are 3 white balloons and 3 blue balloons. How many balloons are there in all?
  18. 18.Isha has 10 mangoes and gets 9 mangoes more. How many mangoes does Isha have now?
  19. 19.There are 9 green balls and 2 blue balls. How many balls are there in all?
  20. 20.? + 6 = 13
  21. 21.1 + 8 =
  22. 22.Saanvi has 7 balls and gets 2 balls more. How many balls does Saanvi have now?
  23. 23.2 + 8 =
  24. 24.Kavya has 4 balloons and gets 16 balloons more. How many balloons does Kavya have now?
  25. 25.There are 12 red beads and 8 pink beads. How many beads are there in all?
  26. 26.14 + 5 =
  27. 27.Tara has 8 laddoos and gets 11 laddoos more. How many laddoos does Tara have now?
  28. 28.10 + ? = 12
  29. 29.15 + 3 =
  30. 30.There are 2 pink crayons and 8 yellow crayons. How many crayons are there in all?
  31. 31.2 + 1 + 5 =
  32. 32.1 + 1 + 8 =
  33. 33.19 + 1 =
  34. 34.8 + 5 + 3 =
  35. 35.There are 2 red crayons and 3 yellow crayons. How many crayons are there in all?
  36. 36.Sneha has 10 marbles and gets 3 marbles more. How many marbles does Sneha have now?
  37. 37.9 + ? = 11
  38. 38.There are 4 green beads and 11 blue beads. How many beads are there in all?
  39. 39.There are 2 yellow flowers and 16 pink flowers. How many flowers are there in all?
  40. 40.4 + 6 + 9 =

Answer key

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

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