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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 138 · 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 8 red beads and 4 white beads. How many beads are there in all?
  2. 2.7 + 5 + 1 =
  3. 3.9 + 9 =
  4. 4.7 + 8 + 5 =
  5. 5.8 + 5 + 7 =
  6. 6.There are 10 blue balloons and 3 red balloons. How many balloons are there in all?
  7. 7.11 + 8 =
  8. 8.There are 4 blue flowers and 13 pink flowers. How many flowers are there in all?
  9. 9.17 + 2 =
  10. 10.Lakshmi has 8 crayons and gets 5 crayons more. How many crayons does Lakshmi have now?
  11. 11.17 + 1 =
  12. 12.Arjun has 5 marbles and gets 4 marbles more. How many marbles does Arjun have now?
  13. 13.9 + 4 =
  14. 14.8 + 1 =
  15. 15.1 + 5 =
  16. 16.Riya has 8 shells and gets 5 shells more. How many shells does Riya have now?
  17. 17.There are 9 blue beads and 7 white beads. How many beads are there in all?
  18. 18.6 + 5 =
  19. 19.6 + 12 =
  20. 20.Diya has 12 marbles and gets 4 marbles more. How many marbles does Diya have now?
  21. 21.There are 5 yellow beads and 5 green beads. How many beads are there in all?
  22. 22.Priya has 9 laddoos and gets 4 laddoos more. How many laddoos does Priya have now?
  23. 23.10 + 9 =
  24. 24.4 + 1 =
  25. 25.? + 3 = 6
  26. 26.5 + 8 + 5 =
  27. 27.? + 2 = 3
  28. 28.Isha has 13 balls and gets 6 balls more. How many balls does Isha have now?
  29. 29.Diya has 5 pencils and gets 14 pencils more. How many pencils does Diya have now?
  30. 30.6 + 6 + 2 =
  31. 31.? + 5 = 18
  32. 32.16 + 2 =
  33. 33.2 + 3 + 13 =
  34. 34.Kabir has 5 books and gets 3 books more. How many books does Kabir have now?
  35. 35.Farhan has 11 crayons and gets 7 crayons more. How many crayons does Farhan have now?
  36. 36.There are 4 green beads and 16 yellow beads. How many beads are there in all?
  37. 37.7 + 5 =
  38. 38.There are 11 red balloons and 3 yellow balloons. How many balloons are there in all?
  39. 39.Isha has 8 mangoes and gets 10 mangoes more. How many mangoes does Isha have now?
  40. 40.13 + 7 =

Answer key

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

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