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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 656 · 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.There are 7 red balls and 10 yellow balls. How many balls are there in all?
  2. 2.13 + 5 =
  3. 3.2 + 18 =
  4. 4.1 + 1 + 3 =
  5. 5.Dev has 9 bananas and gets 6 bananas more. How many bananas does Dev have now?
  6. 6.? + 4 = 12
  7. 7.There are 11 yellow flowers and 2 green flowers. How many flowers are there in all?
  8. 8.Arjun has 13 crayons and gets 2 crayons more. How many crayons does Arjun have now?
  9. 9.? + 3 = 8
  10. 10.There are 3 blue crayons and 10 white crayons. How many crayons are there in all?
  11. 11.4 + 8 =
  12. 12.Manav has 6 pencils and gets 12 pencils more. How many pencils does Manav have now?
  13. 13.9 + 5 =
  14. 14.There are 3 red balloons and 12 pink balloons. How many balloons are there in all?
  15. 15.There are 11 yellow balloons and 4 blue balloons. How many balloons are there in all?
  16. 16.There are 11 blue balloons and 4 green balloons. How many balloons are there in all?
  17. 17.Rohan has 13 shells and gets 5 shells more. How many shells does Rohan have now?
  18. 18.2 + ? = 6
  19. 19.? + 3 = 11
  20. 20.3 + ? = 7
  21. 21.3 + 3 + 2 =
  22. 22.? + 8 = 13
  23. 23.1 + 17 =
  24. 24.? + 7 = 18
  25. 25.1 + 4 + 6 =
  26. 26.1 + ? = 5
  27. 27.6 + 5 + 2 =
  28. 28.1 + 5 + 2 =
  29. 29.Riya has 12 books and gets 4 books more. How many books does Riya have now?
  30. 30.4 + ? = 10
  31. 31.2 + 3 + 12 =
  32. 32.There are 4 red beads and 10 green beads. How many beads are there in all?
  33. 33.Saanvi has 4 flowers and gets 15 flowers more. How many flowers does Saanvi have now?
  34. 34.There are 5 white balls and 10 blue balls. How many balls are there in all?
  35. 35.There are 10 yellow flowers and 9 white flowers. How many flowers are there in all?
  36. 36.19 + 1 =
  37. 37.Kabir has 15 pencils and gets 2 pencils more. How many pencils does Kabir have now?
  38. 38.Rohan has 3 balls and gets 13 balls more. How many balls does Rohan have now?
  39. 39.9 + 11 =
  40. 40.1 + 8 + 2 =

Answer key

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

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