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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 987 · 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. 1.3 + 8 + 7 =
  2. 2.12 + ? = 13
  3. 3.Pooja has 9 shells and gets 7 shells more. How many shells does Pooja have now?
  4. 4.Karan has 15 balloons and gets 3 balloons more. How many balloons does Karan have now?
  5. 5.There are 10 pink crayons and 2 red crayons. How many crayons are there in all?
  6. 6.1 + 2 + 16 =
  7. 7.16 + 2 =
  8. 8.Manav has 4 pencils and gets 16 pencils more. How many pencils does Manav have now?
  9. 9.There are 10 yellow crayons and 10 green crayons. How many crayons are there in all?
  10. 10.6 + 5 + 1 =
  11. 11.? + 1 = 6
  12. 12.3 + ? = 11
  13. 13.Meera has 6 crayons and gets 6 crayons more. How many crayons does Meera have now?
  14. 14.13 + ? = 18
  15. 15.? + 7 = 20
  16. 16.Aarav has 5 books and gets 6 books more. How many books does Aarav have now?
  17. 17.Isha has 5 books and gets 13 books more. How many books does Isha have now?
  18. 18.There are 10 yellow flowers and 5 blue flowers. How many flowers are there in all?
  19. 19.18 + 2 =
  20. 20.5 + 3 =
  21. 21.There are 8 pink crayons and 6 red crayons. How many crayons are there in all?
  22. 22.6 + 2 + 11 =
  23. 23.There are 12 blue flowers and 2 red flowers. How many flowers are there in all?
  24. 24.1 + 3 + 3 =
  25. 25.There are 10 blue balloons and 2 pink balloons. How many balloons are there in all?
  26. 26.12 + 8 =
  27. 27.There are 3 green flowers and 15 yellow flowers. How many flowers are there in all?
  28. 28.Joseph has 5 crayons and gets 4 crayons more. How many crayons does Joseph have now?
  29. 29.14 + 5 =
  30. 30.7 + ? = 10
  31. 31.? + 16 = 17
  32. 32.? + 5 = 8
  33. 33.10 + 10 =
  34. 34.Gurpreet has 11 bananas and gets 2 bananas more. How many bananas does Gurpreet have now?
  35. 35.Riya has 12 balloons and gets 4 balloons more. How many balloons does Riya have now?
  36. 36.Karan has 2 pencils and gets 15 pencils more. How many pencils does Karan have now?
  37. 37.3 + ? = 10
  38. 38.There are 10 white crayons and 2 yellow crayons. How many crayons are there in all?
  39. 39.Diya has 8 books and gets 8 books more. How many books does Diya have now?
  40. 40.There are 10 red flowers and 7 blue flowers. How many flowers are there in all?

Answer key

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

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