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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 521 · 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 9 blue balloons and 2 white balloons. How many balloons are there in all?
  2. 2.? + 5 = 7
  3. 3.3 + 8 =
  4. 4.3 + ? = 8
  5. 5.9 + 1 =
  6. 6.3 + 4 =
  7. 7.There are 11 green balls and 6 red balls. How many balls are there in all?
  8. 8.18 + 2 =
  9. 9.14 + 6 =
  10. 10.Arjun has 9 pencils and gets 6 pencils more. How many pencils does Arjun have now?
  11. 11.3 + 5 =
  12. 12.4 + 10 =
  13. 13.2 + 1 + 10 =
  14. 14.There are 7 yellow beads and 7 pink beads. How many beads are there in all?
  15. 15.? + 2 = 3
  16. 16.? + 1 = 8
  17. 17.Kabir has 3 marbles and gets 4 marbles more. How many marbles does Kabir have now?
  18. 18.? + 8 = 14
  19. 19.11 + 2 =
  20. 20.There are 11 pink flowers and 5 green flowers. How many flowers are there in all?
  21. 21.Rohan has 3 kites and gets 2 kites more. How many kites does Rohan have now?
  22. 22.Ananya has 11 balls and gets 2 balls more. How many balls does Ananya have now?
  23. 23.Dev has 5 flowers and gets 7 flowers more. How many flowers does Dev have now?
  24. 24.3 + 1 =
  25. 25.Vivaan has 10 balloons and gets 6 balloons more. How many balloons does Vivaan have now?
  26. 26.Farhan has 6 mangoes and gets 9 mangoes more. How many mangoes does Farhan have now?
  27. 27.2 + 2 =
  28. 28.Rohan has 10 marbles and gets 7 marbles more. How many marbles does Rohan have now?
  29. 29.There are 9 red balloons and 5 yellow balloons. How many balloons are there in all?
  30. 30.There are 4 green balloons and 7 yellow balloons. How many balloons are there in all?
  31. 31.Karan has 13 crayons and gets 4 crayons more. How many crayons does Karan have now?
  32. 32.? + 5 = 18
  33. 33.8 + 5 + 2 =
  34. 34.Saanvi has 7 laddoos and gets 8 laddoos more. How many laddoos does Saanvi have now?
  35. 35.There are 3 red kites and 4 yellow kites. How many kites are there in all?
  36. 36.? + 16 = 17
  37. 37.8 + ? = 18
  38. 38.There are 4 red balls and 14 blue balls. How many balls are there in all?
  39. 39.7 + 2 + 6 =
  40. 40.16 + 4 =

Answer key

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

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