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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 475 · 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 + 2 + 1 =
  2. 2.There are 8 red balloons and 7 yellow balloons. How many balloons are there in all?
  3. 3.? + 1 = 4
  4. 4.11 + ? = 13
  5. 5.7 + ? = 8
  6. 6.There are 11 blue flowers and 4 pink flowers. How many flowers are there in all?
  7. 7.4 + 7 + 3 =
  8. 8.6 + ? = 12
  9. 9.Vivaan has 15 crayons and gets 5 crayons more. How many crayons does Vivaan have now?
  10. 10.Isha has 7 crayons and gets 7 crayons more. How many crayons does Isha have now?
  11. 11.14 + ? = 16
  12. 12.There are 7 green balloons and 3 pink balloons. How many balloons are there in all?
  13. 13.There are 2 red balloons and 6 white balloons. How many balloons are there in all?
  14. 14.Tara has 2 crayons and gets 5 crayons more. How many crayons does Tara have now?
  15. 15.? + 16 = 17
  16. 16.1 + ? = 3
  17. 17.3 + ? = 19
  18. 18.6 + 1 + 2 =
  19. 19.There are 10 yellow balls and 5 red balls. How many balls are there in all?
  20. 20.There are 12 blue kites and 4 yellow kites. How many kites are there in all?
  21. 21.12 + 3 =
  22. 22.1 + 6 + 2 =
  23. 23.? + 12 = 13
  24. 24.There are 5 blue beads and 12 red beads. How many beads are there in all?
  25. 25.6 + 11 =
  26. 26.? + 1 = 5
  27. 27.3 + ? = 12
  28. 28.Lakshmi has 14 laddoos and gets 6 laddoos more. How many laddoos does Lakshmi have now?
  29. 29.Nisha has 7 books and gets 7 books more. How many books does Nisha have now?
  30. 30.There are 8 pink beads and 9 red beads. How many beads are there in all?
  31. 31.Sneha has 15 pencils and gets 1 pencil more. How many pencils does Sneha have now?
  32. 32.2 + 5 + 13 =
  33. 33.There are 8 yellow balls and 5 green balls. How many balls are there in all?
  34. 34.Arjun has 8 crayons and gets 6 crayons more. How many crayons does Arjun have now?
  35. 35.9 + 3 =
  36. 36.? + 3 = 5
  37. 37.14 + 6 =
  38. 38.12 + 7 =
  39. 39.17 + 3 =
  40. 40.There are 3 yellow beads and 4 blue beads. How many beads are there in all?

Answer key

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

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