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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 757 · 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 + 7 + 2 =
  2. 2.7 + 4 + 3 =
  3. 3.There are 3 red balls and 16 white balls. How many balls are there in all?
  4. 4.3 + ? = 19
  5. 5.7 + 8 + 3 =
  6. 6.12 + 4 =
  7. 7.2 + 6 =
  8. 8.19 + 1 =
  9. 9.There are 4 blue beads and 10 red beads. How many beads are there in all?
  10. 10.7 + 1 + 8 =
  11. 11.15 + 4 =
  12. 12.Aarav has 5 marbles and gets 8 marbles more. How many marbles does Aarav have now?
  13. 13.7 + 10 =
  14. 14.? + 2 = 17
  15. 15.14 + 5 =
  16. 16.Lakshmi has 4 balloons and gets 3 balloons more. How many balloons does Lakshmi have now?
  17. 17.Lakshmi has 2 shells and gets 14 shells more. How many shells does Lakshmi have now?
  18. 18.There are 6 blue flowers and 11 pink flowers. How many flowers are there in all?
  19. 19.? + 8 = 12
  20. 20.? + 1 = 4
  21. 21.Rohan has 11 balloons and gets 3 balloons more. How many balloons does Rohan have now?
  22. 22.There are 11 blue flowers and 8 red flowers. How many flowers are there in all?
  23. 23.Aditya has 10 marbles and gets 6 marbles more. How many marbles does Aditya have now?
  24. 24.3 + 15 =
  25. 25.? + 2 = 12
  26. 26.4 + 2 + 4 =
  27. 27.Riya has 15 mangoes and gets 2 mangoes more. How many mangoes does Riya have now?
  28. 28.Kavya has 6 balloons and gets 3 balloons more. How many balloons does Kavya have now?
  29. 29.18 + 2 =
  30. 30.3 + 1 + 9 =
  31. 31.? + 2 = 7
  32. 32.There are 12 yellow kites and 8 white kites. How many kites are there in all?
  33. 33.3 + 2 =
  34. 34.Aditya has 8 bananas and gets 4 bananas more. How many bananas does Aditya have now?
  35. 35.There are 3 pink balls and 8 yellow balls. How many balls are there in all?
  36. 36.6 + ? = 17
  37. 37.16 + 3 =
  38. 38.Pooja has 2 balls and gets 15 balls more. How many balls does Pooja have now?
  39. 39.There are 12 pink beads and 2 blue beads. How many beads are there in all?
  40. 40.Rahul has 15 balls and gets 5 balls more. How many balls does Rahul have now?

Answer key

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

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