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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 207 · 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 5 red crayons and 9 blue crayons. How many crayons are there in all?
  2. 2.1 + 2 + 15 =
  3. 3.8 + ? = 14
  4. 4.5 + 15 =
  5. 5.There are 7 pink crayons and 3 white crayons. How many crayons are there in all?
  6. 6.6 + 4 =
  7. 7.Isha has 5 shells and gets 4 shells more. How many shells does Isha have now?
  8. 8.6 + ? = 14
  9. 9.There are 2 red kites and 17 blue kites. How many kites are there in all?
  10. 10.Meera has 9 balls and gets 1 ball more. How many balls does Meera have now?
  11. 11.There are 8 white flowers and 11 pink flowers. How many flowers are there in all?
  12. 12.1 + 3 + 15 =
  13. 13.There are 4 pink kites and 7 red kites. How many kites are there in all?
  14. 14.8 + 1 + 3 =
  15. 15.16 + 1 =
  16. 16.? + 16 = 18
  17. 17.Karan has 11 mangoes and gets 6 mangoes more. How many mangoes does Karan have now?
  18. 18.Aarav has 15 pencils and gets 1 pencil more. How many pencils does Aarav have now?
  19. 19.1 + 6 + 11 =
  20. 20.3 + 6 + 11 =
  21. 21.Priya has 10 laddoos and gets 8 laddoos more. How many laddoos does Priya have now?
  22. 22.There are 9 pink beads and 8 red beads. How many beads are there in all?
  23. 23.1 + 8 + 1 =
  24. 24.? + 3 = 5
  25. 25.There are 12 red balloons and 5 pink balloons. How many balloons are there in all?
  26. 26.? + 1 = 3
  27. 27.Ishaan has 2 crayons and gets 2 crayons more. How many crayons does Ishaan have now?
  28. 28.There are 4 yellow crayons and 4 pink crayons. How many crayons are there in all?
  29. 29.7 + ? = 20
  30. 30.There are 7 blue crayons and 7 yellow crayons. How many crayons are there in all?
  31. 31.There are 12 yellow beads and 4 green beads. How many beads are there in all?
  32. 32.Isha has 10 laddoos and gets 3 laddoos more. How many laddoos does Isha have now?
  33. 33.? + 3 = 10
  34. 34.1 + ? = 11
  35. 35.11 + 1 =
  36. 36.1 + 7 + 3 =
  37. 37.There are 11 blue crayons and 6 green crayons. How many crayons are there in all?
  38. 38.5 + 2 + 7 =
  39. 39.10 + 5 =
  40. 40.There are 10 white balls and 10 blue balls. How many balls are there in all?

Answer key

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

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