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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 150 · 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. 1.11 + 1 =
  2. 2.Arjun has 2 balls and gets 17 balls more. How many balls does Arjun have now?
  3. 3.3 + 8 + 8 =
  4. 4.4 + 4 + 6 =
  5. 5.18 + 2 =
  6. 6.7 + 5 + 7 =
  7. 7.There are 12 blue kites and 3 red kites. How many kites are there in all?
  8. 8.There are 10 pink flowers and 5 red flowers. How many flowers are there in all?
  9. 9.4 + 8 + 4 =
  10. 10.3 + 1 + 16 =
  11. 11.3 + 1 + 12 =
  12. 12.7 + 8 + 2 =
  13. 13.13 + 1 =
  14. 14.There are 7 blue balls and 3 red balls. How many balls are there in all?
  15. 15.6 + 1 + 3 =
  16. 16.2 + ? = 7
  17. 17.Kabir has 15 balls and gets 5 balls more. How many balls does Kabir have now?
  18. 18.5 + ? = 10
  19. 19.There are 5 red beads and 2 green beads. How many beads are there in all?
  20. 20.6 + 3 =
  21. 21.Ananya has 3 laddoos and gets 8 laddoos more. How many laddoos does Ananya have now?
  22. 22.12 + 4 =
  23. 23.15 + 2 =
  24. 24.Ishaan has 15 balls and gets 2 balls more. How many balls does Ishaan have now?
  25. 25.There are 6 yellow balls and 4 blue balls. How many balls are there in all?
  26. 26.6 + 14 =
  27. 27.8 + ? = 9
  28. 28.Karan has 6 balls and gets 9 balls more. How many balls does Karan have now?
  29. 29.6 + ? = 10
  30. 30.1 + 1 + 3 =
  31. 31.8 + 8 + 2 =
  32. 32.5 + 8 + 5 =
  33. 33.19 + 1 =
  34. 34.Sneha has 14 mangoes and gets 6 mangoes more. How many mangoes does Sneha have now?
  35. 35.8 + 4 + 5 =
  36. 36.2 + 7 + 5 =
  37. 37.2 + 16 =
  38. 38.4 + 7 + 7 =
  39. 39.Aditya has 7 marbles and gets 11 marbles more. How many marbles does Aditya have now?
  40. 40.Aarav has 3 bananas and gets 12 bananas more. How many bananas does Aarav have now?

Answer key

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

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