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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 730 · 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. 1.4 + ? = 6
  2. 2.5 + 4 =
  3. 3.4 + 3 =
  4. 4.3 + 14 =
  5. 5.11 + 8 =
  6. 6.1 + ? = 3
  7. 7.4 + 14 =
  8. 8.Karan has 10 balloons and gets 8 balloons more. How many balloons does Karan have now?
  9. 9.18 + 2 =
  10. 10.2 + 1 + 5 =
  11. 11.3 + 6 + 11 =
  12. 12.2 + 6 + 12 =
  13. 13.There are 6 yellow kites and 7 pink kites. How many kites are there in all?
  14. 14.6 + 9 =
  15. 15.Zoya has 14 laddoos and gets 6 laddoos more. How many laddoos does Zoya have now?
  16. 16.Diya has 4 flowers and gets 4 flowers more. How many flowers does Diya have now?
  17. 17.? + 9 = 12
  18. 18.There are 8 white balloons and 11 yellow balloons. How many balloons are there in all?
  19. 19.5 + ? = 13
  20. 20.? + 5 = 16
  21. 21.7 + ? = 10
  22. 22.There are 2 blue balloons and 13 white balloons. How many balloons are there in all?
  23. 23.? + 8 = 11
  24. 24.There are 8 red balloons and 3 yellow balloons. How many balloons are there in all?
  25. 25.2 + ? = 9
  26. 26.6 + 5 + 4 =
  27. 27.? + 5 = 8
  28. 28.Zoya has 11 pencils and gets 7 pencils more. How many pencils does Zoya have now?
  29. 29.? + 12 = 20
  30. 30.11 + 5 =
  31. 31.Pooja has 8 balloons and gets 3 balloons more. How many balloons does Pooja have now?
  32. 32.2 + 4 + 2 =
  33. 33.4 + 4 =
  34. 34.There are 9 pink crayons and 11 white crayons. How many crayons are there in all?
  35. 35.There are 2 white flowers and 13 green flowers. How many flowers are there in all?
  36. 36.? + 12 = 13
  37. 37.There are 2 green crayons and 9 blue crayons. How many crayons are there in all?
  38. 38.5 + 1 + 1 =
  39. 39.Karan has 6 balls and gets 2 balls more. How many balls does Karan have now?
  40. 40.1 + ? = 6

Answer key

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

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