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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 904 · 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.Zoya has 8 books and gets 1 book more. How many books does Zoya have now?
  2. 2.Ishaan has 2 kites and gets 18 kites more. How many kites does Ishaan have now?
  3. 3.Priya has 5 balls and gets 9 balls more. How many balls does Priya have now?
  4. 4.2 + 2 + 14 =
  5. 5.1 + 8 + 9 =
  6. 6.There are 11 yellow crayons and 6 blue crayons. How many crayons are there in all?
  7. 7.2 + 7 + 3 =
  8. 8.7 + 3 =
  9. 9.4 + ? = 5
  10. 10.3 + 6 + 10 =
  11. 11.Arjun has 10 balloons and gets 2 balloons more. How many balloons does Arjun have now?
  12. 12.? + 6 = 14
  13. 13.7 + 2 + 11 =
  14. 14.1 + 1 + 9 =
  15. 15.12 + 6 =
  16. 16.There are 7 blue beads and 8 white beads. How many beads are there in all?
  17. 17.3 + 6 + 5 =
  18. 18.12 + 5 =
  19. 19.8 + 5 =
  20. 20.? + 7 = 19
  21. 21.? + 6 = 12
  22. 22.8 + 4 + 4 =
  23. 23.4 + 15 =
  24. 24.There are 4 green balloons and 7 white balloons. How many balloons are there in all?
  25. 25.1 + 1 + 5 =
  26. 26.5 + 3 =
  27. 27.10 + 1 =
  28. 28.? + 4 = 11
  29. 29.? + 6 = 13
  30. 30.There are 4 blue balloons and 4 green balloons. How many balloons are there in all?
  31. 31.3 + ? = 5
  32. 32.1 + ? = 3
  33. 33.2 + 4 + 1 =
  34. 34.Manav has 5 marbles and gets 4 marbles more. How many marbles does Manav have now?
  35. 35.14 + 2 =
  36. 36.4 + 2 + 1 =
  37. 37.3 + 1 + 4 =
  38. 38.There are 12 green crayons and 3 yellow crayons. How many crayons are there in all?
  39. 39.Aarav has 12 balloons and gets 5 balloons more. How many balloons does Aarav have now?
  40. 40.There are 10 yellow balls and 4 red balls. How many balls are there in all?

Answer key

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

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