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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 73 · 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. 1.7 + 7 + 3 =
  2. 2.4 + 2 + 13 =
  3. 3.7 + 8 =
  4. 4.Tara has 3 mangoes and gets 13 mangoes more. How many mangoes does Tara have now?
  5. 5.There are 7 blue crayons and 3 green crayons. How many crayons are there in all?
  6. 6.There are 9 red balloons and 8 blue balloons. How many balloons are there in all?
  7. 7.There are 4 blue balloons and 16 red balloons. How many balloons are there in all?
  8. 8.18 + 2 =
  9. 9.Kabir has 12 pencils and gets 4 pencils more. How many pencils does Kabir have now?
  10. 10.There are 7 yellow beads and 5 white beads. How many beads are there in all?
  11. 11.? + 6 = 10
  12. 12.There are 11 blue kites and 5 yellow kites. How many kites are there in all?
  13. 13.Vivaan has 11 shells and gets 8 shells more. How many shells does Vivaan have now?
  14. 14.18 + 1 =
  15. 15.Saanvi has 15 shells and gets 3 shells more. How many shells does Saanvi have now?
  16. 16.1 + 4 + 11 =
  17. 17.Meera has 11 mangoes and gets 3 mangoes more. How many mangoes does Meera have now?
  18. 18.1 + 3 =
  19. 19.10 + 10 =
  20. 20.Farhan has 2 flowers and gets 5 flowers more. How many flowers does Farhan have now?
  21. 21.There are 6 blue kites and 11 red kites. How many kites are there in all?
  22. 22.9 + 4 =
  23. 23.Aarav has 8 shells and gets 5 shells more. How many shells does Aarav have now?
  24. 24.? + 2 = 15
  25. 25.There are 12 blue flowers and 5 white flowers. How many flowers are there in all?
  26. 26.1 + 6 + 4 =
  27. 27.? + 1 = 10
  28. 28.16 + 3 =
  29. 29.There are 4 green balloons and 7 blue balloons. How many balloons are there in all?
  30. 30.15 + 1 =
  31. 31.3 + 1 + 6 =
  32. 32.? + 4 = 5
  33. 33.15 + 4 =
  34. 34.7 + 13 =
  35. 35.7 + ? = 8
  36. 36.12 + 7 =
  37. 37.9 + ? = 15
  38. 38.3 + ? = 11
  39. 39.4 + 4 =
  40. 40.1 + ? = 3

Answer key

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

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