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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 98 · 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. 1.2 + 7 + 8 =
  2. 2.There are 4 pink balls and 14 green balls. How many balls are there in all?
  3. 3.1 + 6 + 13 =
  4. 4.8 + 7 + 5 =
  5. 5.10 + 5 =
  6. 6.8 + ? = 17
  7. 7.1 + ? = 3
  8. 8.? + 1 = 4
  9. 9.There are 10 green beads and 7 white beads. How many beads are there in all?
  10. 10.1 + 2 + 11 =
  11. 11.2 + 5 + 9 =
  12. 12.4 + 14 =
  13. 13.9 + 8 =
  14. 14.Zoya has 15 bananas and gets 1 banana more. How many bananas does Zoya have now?
  15. 15.Manav has 10 balls and gets 2 balls more. How many balls does Manav have now?
  16. 16.There are 11 blue flowers and 4 green flowers. How many flowers are there in all?
  17. 17.11 + 4 =
  18. 18.There are 6 blue balls and 11 pink balls. How many balls are there in all?
  19. 19.3 + 14 =
  20. 20.19 + 1 =
  21. 21.5 + 4 + 7 =
  22. 22.Kabir has 15 books and gets 5 books more. How many books does Kabir have now?
  23. 23.There are 7 blue kites and 11 yellow kites. How many kites are there in all?
  24. 24.There are 3 red kites and 13 yellow kites. How many kites are there in all?
  25. 25.There are 10 green balls and 9 red balls. How many balls are there in all?
  26. 26.Manav has 15 balloons and gets 1 balloon more. How many balloons does Manav have now?
  27. 27.5 + 1 + 3 =
  28. 28.? + 5 = 8
  29. 29.5 + 3 + 5 =
  30. 30.? + 11 = 17
  31. 31.5 + 9 =
  32. 32.There are 5 red kites and 15 blue kites. How many kites are there in all?
  33. 33.7 + 5 + 8 =
  34. 34.Dev has 3 balls and gets 14 balls more. How many balls does Dev have now?
  35. 35.1 + 8 + 5 =
  36. 36.9 + 6 =
  37. 37.2 + 7 + 2 =
  38. 38.8 + 1 + 11 =
  39. 39.4 + 5 + 4 =
  40. 40.6 + 8 + 2 =

Answer key

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

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