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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 390 · 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 5 blue balls and 4 pink balls. How many balls are there in all?
  2. 2.6 + 6 + 4 =
  3. 3.7 + 1 =
  4. 4.Ananya has 4 flowers and gets 9 flowers more. How many flowers does Ananya have now?
  5. 5.15 + ? = 17
  6. 6.6 + ? = 9
  7. 7.Rohan has 2 balloons and gets 8 balloons more. How many balloons does Rohan have now?
  8. 8.1 + 7 + 3 =
  9. 9.1 + 10 =
  10. 10.10 + 8 =
  11. 11.2 + 5 =
  12. 12.2 + 5 + 10 =
  13. 13.? + 15 = 20
  14. 14.12 + 7 =
  15. 15.Farhan has 9 books and gets 6 books more. How many books does Farhan have now?
  16. 16.? + 1 = 4
  17. 17.8 + 1 =
  18. 18.5 + 8 =
  19. 19.There are 3 blue balls and 4 red balls. How many balls are there in all?
  20. 20.8 + 3 + 7 =
  21. 21.Rohan has 5 books and gets 5 books more. How many books does Rohan have now?
  22. 22.Isha has 4 bananas and gets 12 bananas more. How many bananas does Isha have now?
  23. 23.7 + 7 + 4 =
  24. 24.4 + ? = 17
  25. 25.5 + ? = 19
  26. 26.5 + 8 + 4 =
  27. 27.Rohan has 13 mangoes and gets 3 mangoes more. How many mangoes does Rohan have now?
  28. 28.2 + ? = 4
  29. 29.2 + 5 + 5 =
  30. 30.1 + ? = 8
  31. 31.7 + 8 =
  32. 32.There are 4 blue flowers and 10 yellow flowers. How many flowers are there in all?
  33. 33.7 + 8 + 4 =
  34. 34.15 + 2 =
  35. 35.Aarav has 12 balls and gets 2 balls more. How many balls does Aarav have now?
  36. 36.There are 4 blue flowers and 2 red flowers. How many flowers are there in all?
  37. 37.6 + 1 + 4 =
  38. 38.1 + 1 =
  39. 39.There are 9 pink flowers and 9 yellow flowers. How many flowers are there in all?
  40. 40.Joseph has 5 pencils and gets 8 pencils more. How many pencils does Joseph have now?

Answer key

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

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