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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 877 · 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 3 red balls and 11 blue balls. How many balls are there in all?
  2. 2.Nisha has 4 kites and gets 12 kites more. How many kites does Nisha have now?
  3. 3.8 + 2 + 9 =
  4. 4.7 + ? = 10
  5. 5.1 + 7 + 3 =
  6. 6.13 + 2 =
  7. 7.1 + ? = 7
  8. 8.4 + 5 =
  9. 9.There are 11 yellow beads and 3 red beads. How many beads are there in all?
  10. 10.14 + ? = 15
  11. 11.? + 1 = 11
  12. 12.4 + 8 + 3 =
  13. 13.13 + 3 =
  14. 14.? + 11 = 12
  15. 15.3 + 10 =
  16. 16.There are 2 red flowers and 5 blue flowers. How many flowers are there in all?
  17. 17.There are 10 yellow balloons and 6 red balloons. How many balloons are there in all?
  18. 18.1 + ? = 12
  19. 19.12 + ? = 16
  20. 20.Sneha has 4 balls and gets 14 balls more. How many balls does Sneha have now?
  21. 21.10 + 1 =
  22. 22.? + 5 = 6
  23. 23.Ishaan has 14 marbles and gets 1 marble more. How many marbles does Ishaan have now?
  24. 24.Arjun has 4 balloons and gets 1 balloon more. How many balloons does Arjun have now?
  25. 25.There are 3 red kites and 4 white kites. How many kites are there in all?
  26. 26.There are 8 green balloons and 9 red balloons. How many balloons are there in all?
  27. 27.2 + 8 + 10 =
  28. 28.? + 8 = 13
  29. 29.There are 4 yellow crayons and 15 pink crayons. How many crayons are there in all?
  30. 30.6 + 6 + 1 =
  31. 31.There are 2 blue balls and 3 yellow balls. How many balls are there in all?
  32. 32.8 + 6 =
  33. 33.? + 17 = 20
  34. 34.7 + 2 + 2 =
  35. 35.? + 5 = 14
  36. 36.Nisha has 2 laddoos and gets 4 laddoos more. How many laddoos does Nisha have now?
  37. 37.Kavya has 3 balls and gets 6 balls more. How many balls does Kavya have now?
  38. 38.? + 3 = 8
  39. 39.4 + ? = 11
  40. 40.18 + 2 =

Answer key

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

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