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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 551 · 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. 1.12 + 8 =
  2. 2.4 + ? = 13
  3. 3.Nisha has 10 marbles and gets 7 marbles more. How many marbles does Nisha have now?
  4. 4.Rohan has 9 marbles and gets 11 marbles more. How many marbles does Rohan have now?
  5. 5.8 + 2 + 8 =
  6. 6.Diya has 2 mangoes and gets 3 mangoes more. How many mangoes does Diya have now?
  7. 7.12 + 4 =
  8. 8.5 + 4 =
  9. 9.13 + 7 =
  10. 10.Dev has 6 marbles and gets 5 marbles more. How many marbles does Dev have now?
  11. 11.12 + ? = 19
  12. 12.15 + 1 =
  13. 13.9 + 2 =
  14. 14.Priya has 13 kites and gets 2 kites more. How many kites does Priya have now?
  15. 15.Karan has 15 pencils and gets 2 pencils more. How many pencils does Karan have now?
  16. 16.8 + 5 + 1 =
  17. 17.Pooja has 8 books and gets 2 books more. How many books does Pooja have now?
  18. 18.Lakshmi has 14 balloons and gets 4 balloons more. How many balloons does Lakshmi have now?
  19. 19.7 + ? = 18
  20. 20.There are 10 pink balloons and 2 yellow balloons. How many balloons are there in all?
  21. 21.Isha has 9 bananas and gets 2 bananas more. How many bananas does Isha have now?
  22. 22.15 + 5 =
  23. 23.2 + 8 + 5 =
  24. 24.4 + ? = 8
  25. 25.Karan has 12 balls and gets 3 balls more. How many balls does Karan have now?
  26. 26.17 + 3 =
  27. 27.Kabir has 6 balloons and gets 1 balloon more. How many balloons does Kabir have now?
  28. 28.2 + 3 + 3 =
  29. 29.There are 12 pink flowers and 4 blue flowers. How many flowers are there in all?
  30. 30.3 + 6 + 9 =
  31. 31.Nisha has 2 marbles and gets 9 marbles more. How many marbles does Nisha have now?
  32. 32.2 + 15 =
  33. 33.Pooja has 8 pencils and gets 1 pencil more. How many pencils does Pooja have now?
  34. 34.? + 1 = 3
  35. 35.There are 5 green balloons and 6 pink balloons. How many balloons are there in all?
  36. 36.2 + 5 + 13 =
  37. 37.7 + 7 =
  38. 38.2 + 4 + 6 =
  39. 39.2 + 6 =
  40. 40.1 + 3 + 1 =

Answer key

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

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