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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 287 · 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. 1.1 + 3 + 15 =
  2. 2.8 + 1 + 2 =
  3. 3.13 + 3 =
  4. 4.Diya has 13 marbles and gets 3 marbles more. How many marbles does Diya have now?
  5. 5.2 + 1 + 10 =
  6. 6.Karan has 9 books and gets 11 books more. How many books does Karan have now?
  7. 7.7 + 1 + 10 =
  8. 8.5 + ? = 18
  9. 9.There are 5 pink beads and 8 blue beads. How many beads are there in all?
  10. 10.? + 5 = 20
  11. 11.Arjun has 6 books and gets 3 books more. How many books does Arjun have now?
  12. 12.13 + 1 =
  13. 13.3 + 7 + 7 =
  14. 14.7 + 1 + 9 =
  15. 15.16 + 4 =
  16. 16.There are 8 green kites and 4 pink kites. How many kites are there in all?
  17. 17.2 + 6 + 5 =
  18. 18.15 + 4 =
  19. 19.3 + ? = 4
  20. 20.5 + 6 + 4 =
  21. 21.4 + ? = 14
  22. 22.Ananya has 10 laddoos and gets 1 laddoo more. How many laddoos does Ananya have now?
  23. 23.? + 6 = 7
  24. 24.17 + 1 =
  25. 25.Lakshmi has 4 shells and gets 3 shells more. How many shells does Lakshmi have now?
  26. 26.There are 3 blue beads and 6 red beads. How many beads are there in all?
  27. 27.Ishaan has 15 flowers and gets 1 flower more. How many flowers does Ishaan have now?
  28. 28.Riya has 5 flowers and gets 14 flowers more. How many flowers does Riya have now?
  29. 29.7 + 3 =
  30. 30.There are 5 yellow balloons and 13 green balloons. How many balloons are there in all?
  31. 31.1 + ? = 4
  32. 32.There are 9 yellow beads and 2 red beads. How many beads are there in all?
  33. 33.6 + 1 + 6 =
  34. 34.? + 12 = 18
  35. 35.1 + 2 + 1 =
  36. 36.5 + 4 + 5 =
  37. 37.1 + 5 + 3 =
  38. 38.There are 4 white balls and 2 green balls. How many balls are there in all?
  39. 39.2 + 8 + 3 =
  40. 40.3 + ? = 20

Answer key

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

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