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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 641 · 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 + 4 =
  2. 2.4 + 1 + 4 =
  3. 3.There are 3 red balloons and 10 pink balloons. How many balloons are there in all?
  4. 4.7 + 6 + 7 =
  5. 5.There are 3 white kites and 2 pink kites. How many kites are there in all?
  6. 6.19 + 1 =
  7. 7.There are 3 yellow balls and 12 blue balls. How many balls are there in all?
  8. 8.15 + 3 =
  9. 9.7 + 8 + 3 =
  10. 10.Aarav has 6 pencils and gets 14 pencils more. How many pencils does Aarav have now?
  11. 11.There are 9 green kites and 8 blue kites. How many kites are there in all?
  12. 12.? + 12 = 15
  13. 13.3 + ? = 4
  14. 14.6 + 1 + 7 =
  15. 15.Isha has 8 bananas and gets 8 bananas more. How many bananas does Isha have now?
  16. 16.9 + ? = 10
  17. 17.Priya has 15 shells and gets 1 shell more. How many shells does Priya have now?
  18. 18.6 + 2 =
  19. 19.Meera has 13 balloons and gets 2 balloons more. How many balloons does Meera have now?
  20. 20.Manav has 14 books and gets 1 book more. How many books does Manav have now?
  21. 21.There are 2 red balloons and 15 blue balloons. How many balloons are there in all?
  22. 22.12 + 8 =
  23. 23.17 + ? = 18
  24. 24.12 + 6 =
  25. 25.8 + 1 + 3 =
  26. 26.4 + 13 =
  27. 27.Joseph has 10 shells and gets 8 shells more. How many shells does Joseph have now?
  28. 28.1 + 1 =
  29. 29.There are 3 yellow beads and 3 pink beads. How many beads are there in all?
  30. 30.Aarav has 9 marbles and gets 7 marbles more. How many marbles does Aarav have now?
  31. 31.1 + 7 + 3 =
  32. 32.There are 5 pink crayons and 3 white crayons. How many crayons are there in all?
  33. 33.There are 9 green beads and 8 yellow beads. How many beads are there in all?
  34. 34.2 + ? = 4
  35. 35.1 + 2 + 11 =
  36. 36.There are 8 pink beads and 2 red beads. How many beads are there in all?
  37. 37.4 + ? = 6
  38. 38.1 + 5 =
  39. 39.1 + 19 =
  40. 40.? + 8 = 17

Answer key

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

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