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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 240 · 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 + 5 + 4 =
  2. 2.6 + 1 =
  3. 3.4 + 1 + 7 =
  4. 4.18 + ? = 20
  5. 5.6 + ? = 10
  6. 6.2 + 1 + 13 =
  7. 7.3 + 8 + 6 =
  8. 8.There are 7 green beads and 9 blue beads. How many beads are there in all?
  9. 9.1 + ? = 6
  10. 10.Farhan has 3 books and gets 12 books more. How many books does Farhan have now?
  11. 11.Rahul has 6 books and gets 6 books more. How many books does Rahul have now?
  12. 12.Kavya has 11 balloons and gets 3 balloons more. How many balloons does Kavya have now?
  13. 13.There are 8 blue balloons and 4 yellow balloons. How many balloons are there in all?
  14. 14.There are 5 red balls and 10 yellow balls. How many balls are there in all?
  15. 15.Lakshmi has 12 balloons and gets 7 balloons more. How many balloons does Lakshmi have now?
  16. 16.3 + ? = 5
  17. 17.8 + 1 + 2 =
  18. 18.4 + 2 + 5 =
  19. 19.Nisha has 7 books and gets 4 books more. How many books does Nisha have now?
  20. 20.? + 4 = 18
  21. 21.There are 3 yellow flowers and 4 blue flowers. How many flowers are there in all?
  22. 22.Dev has 13 flowers and gets 7 flowers more. How many flowers does Dev have now?
  23. 23.There are 8 pink kites and 7 blue kites. How many kites are there in all?
  24. 24.15 + 1 =
  25. 25.13 + 4 =
  26. 26.4 + 7 + 3 =
  27. 27.There are 8 white flowers and 3 red flowers. How many flowers are there in all?
  28. 28.19 + 1 =
  29. 29.There are 4 blue balls and 15 green balls. How many balls are there in all?
  30. 30.16 + 1 =
  31. 31.5 + 5 =
  32. 32.? + 14 = 15
  33. 33.12 + 4 =
  34. 34.Ananya has 3 shells and gets 15 shells more. How many shells does Ananya have now?
  35. 35.6 + ? = 8
  36. 36.Diya has 4 pencils and gets 13 pencils more. How many pencils does Diya have now?
  37. 37.5 + ? = 14
  38. 38.Rohan has 3 balls and gets 17 balls more. How many balls does Rohan have now?
  39. 39.12 + ? = 18
  40. 40.3 + 8 + 2 =

Answer key

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

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