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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 279 · 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. 1.4 + 5 + 5 =
  2. 2.Rahul has 10 shells and gets 1 shell more. How many shells does Rahul have now?
  3. 3.Priya has 13 balls and gets 4 balls more. How many balls does Priya have now?
  4. 4.Rahul has 5 bananas and gets 13 bananas more. How many bananas does Rahul have now?
  5. 5.Arjun has 3 mangoes and gets 12 mangoes more. How many mangoes does Arjun have now?
  6. 6.There are 11 white balls and 7 pink balls. How many balls are there in all?
  7. 7.There are 11 green flowers and 6 blue flowers. How many flowers are there in all?
  8. 8.There are 12 blue crayons and 5 white crayons. How many crayons are there in all?
  9. 9.There are 11 pink crayons and 5 red crayons. How many crayons are there in all?
  10. 10.Ishaan has 14 shells and gets 5 shells more. How many shells does Ishaan have now?
  11. 11.3 + 8 + 1 =
  12. 12.There are 11 green flowers and 2 yellow flowers. How many flowers are there in all?
  13. 13.Aditya has 2 flowers and gets 17 flowers more. How many flowers does Aditya have now?
  14. 14.10 + 9 =
  15. 15.12 + 8 =
  16. 16.? + 1 = 3
  17. 17.5 + 7 =
  18. 18.? + 2 = 3
  19. 19.6 + 8 + 4 =
  20. 20.16 + 2 =
  21. 21.Ishaan has 9 marbles and gets 3 marbles more. How many marbles does Ishaan have now?
  22. 22.12 + ? = 17
  23. 23.Sneha has 12 pencils and gets 5 pencils more. How many pencils does Sneha have now?
  24. 24.Diya has 11 shells and gets 3 shells more. How many shells does Diya have now?
  25. 25.There are 11 white crayons and 9 green crayons. How many crayons are there in all?
  26. 26.Kabir has 10 shells and gets 4 shells more. How many shells does Kabir have now?
  27. 27.There are 9 blue beads and 4 red beads. How many beads are there in all?
  28. 28.3 + ? = 8
  29. 29.7 + 8 =
  30. 30.5 + 1 + 3 =
  31. 31.4 + ? = 10
  32. 32.1 + ? = 7
  33. 33.18 + 1 =
  34. 34.3 + 16 =
  35. 35.Joseph has 13 balloons and gets 5 balloons more. How many balloons does Joseph have now?
  36. 36.? + 1 = 18
  37. 37.8 + 7 =
  38. 38.3 + 5 + 2 =
  39. 39.There are 11 white balls and 9 blue balls. How many balls are there in all?
  40. 40.There are 9 red kites and 8 pink kites. How many kites are there in all?

Answer key

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

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