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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 151 · 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. 1.10 + 2 =
  2. 2.Zoya has 9 bananas and gets 7 bananas more. How many bananas does Zoya have now?
  3. 3.There are 6 red balloons and 13 white balloons. How many balloons are there in all?
  4. 4.? + 15 = 20
  5. 5.4 + 3 + 13 =
  6. 6.There are 11 pink balls and 9 red balls. How many balls are there in all?
  7. 7.There are 10 pink beads and 7 blue beads. How many beads are there in all?
  8. 8.Priya has 5 balloons and gets 7 balloons more. How many balloons does Priya have now?
  9. 9.Lakshmi has 12 shells and gets 2 shells more. How many shells does Lakshmi have now?
  10. 10.4 + 7 + 5 =
  11. 11.15 + 1 =
  12. 12.10 + 5 =
  13. 13.19 + 1 =
  14. 14.There are 10 yellow kites and 6 blue kites. How many kites are there in all?
  15. 15.4 + 4 + 8 =
  16. 16.? + 1 = 4
  17. 17.12 + ? = 20
  18. 18.5 + 2 + 3 =
  19. 19.? + 8 = 12
  20. 20.10 + 6 =
  21. 21.Joseph has 11 laddoos and gets 4 laddoos more. How many laddoos does Joseph have now?
  22. 22.There are 9 red balloons and 11 pink balloons. How many balloons are there in all?
  23. 23.Rohan has 7 balls and gets 9 balls more. How many balls does Rohan have now?
  24. 24.13 + 2 =
  25. 25.10 + 7 =
  26. 26.? + 3 = 9
  27. 27.1 + 5 + 6 =
  28. 28.There are 2 green crayons and 5 pink crayons. How many crayons are there in all?
  29. 29.14 + 4 =
  30. 30.There are 10 yellow beads and 5 green beads. How many beads are there in all?
  31. 31.Vivaan has 5 crayons and gets 15 crayons more. How many crayons does Vivaan have now?
  32. 32.6 + 2 + 7 =
  33. 33.? + 2 = 14
  34. 34.1 + ? = 3
  35. 35.Aarav has 15 balloons and gets 5 balloons more. How many balloons does Aarav have now?
  36. 36.There are 11 blue balls and 3 red balls. How many balls are there in all?
  37. 37.1 + 18 =
  38. 38.8 + 1 + 1 =
  39. 39.5 + 5 + 5 =
  40. 40.? + 1 = 12

Answer key

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

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