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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 43 · 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. 1.5 + 8 + 5 =
  2. 2.10 + ? = 18
  3. 3.Aditya has 7 mangoes and gets 5 mangoes more. How many mangoes does Aditya have now?
  4. 4.3 + ? = 5
  5. 5.There are 9 green beads and 6 yellow beads. How many beads are there in all?
  6. 6.9 + 4 =
  7. 7.3 + 1 + 4 =
  8. 8.1 + 8 + 1 =
  9. 9.There are 6 red flowers and 8 yellow flowers. How many flowers are there in all?
  10. 10.There are 12 white flowers and 2 red flowers. How many flowers are there in all?
  11. 11.There are 8 blue crayons and 2 pink crayons. How many crayons are there in all?
  12. 12.8 + ? = 10
  13. 13.5 + ? = 11
  14. 14.5 + 11 =
  15. 15.15 + 3 =
  16. 16.1 + 1 + 13 =
  17. 17.Aarav has 3 laddoos and gets 5 laddoos more. How many laddoos does Aarav have now?
  18. 18.7 + 5 + 1 =
  19. 19.Joseph has 7 laddoos and gets 2 laddoos more. How many laddoos does Joseph have now?
  20. 20.There are 4 yellow flowers and 15 red flowers. How many flowers are there in all?
  21. 21.Vivaan has 9 marbles and gets 1 marble more. How many marbles does Vivaan have now?
  22. 22.Kavya has 10 crayons and gets 3 crayons more. How many crayons does Kavya have now?
  23. 23.There are 11 white beads and 9 green beads. How many beads are there in all?
  24. 24.Aarav has 6 balls and gets 3 balls more. How many balls does Aarav have now?
  25. 25.Sneha has 5 pencils and gets 2 pencils more. How many pencils does Sneha have now?
  26. 26.Joseph has 5 marbles and gets 8 marbles more. How many marbles does Joseph have now?
  27. 27.There are 12 blue balloons and 2 red balloons. How many balloons are there in all?
  28. 28.3 + 5 + 8 =
  29. 29.Vivaan has 4 pencils and gets 2 pencils more. How many pencils does Vivaan have now?
  30. 30.Nisha has 11 balloons and gets 3 balloons more. How many balloons does Nisha have now?
  31. 31.7 + 5 =
  32. 32.13 + 6 =
  33. 33.6 + ? = 8
  34. 34.10 + 10 =
  35. 35.There are 11 white flowers and 4 green flowers. How many flowers are there in all?
  36. 36.3 + 4 + 7 =
  37. 37.Rohan has 15 balloons and gets 4 balloons more. How many balloons does Rohan have now?
  38. 38.There are 7 yellow kites and 3 pink kites. How many kites are there in all?
  39. 39.There are 12 yellow balloons and 2 red balloons. How many balloons are there in all?
  40. 40.6 + 3 + 6 =

Answer key

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

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