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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 933 · 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 yellow crayons and 5 red crayons. How many crayons are there in all?
  2. 2.Lakshmi has 3 mangoes and gets 4 mangoes more. How many mangoes does Lakshmi have now?
  3. 3.Zoya has 12 balloons and gets 7 balloons more. How many balloons does Zoya have now?
  4. 4.There are 10 green balls and 4 blue balls. How many balls are there in all?
  5. 5.Karan has 11 bananas and gets 9 bananas more. How many bananas does Karan have now?
  6. 6.Manav has 10 balls and gets 10 balls more. How many balls does Manav have now?
  7. 7.? + 17 = 20
  8. 8.Zoya has 4 balloons and gets 11 balloons more. How many balloons does Zoya have now?
  9. 9.Joseph has 5 balls and gets 15 balls more. How many balls does Joseph have now?
  10. 10.? + 5 = 7
  11. 11.17 + 2 =
  12. 12.7 + 2 =
  13. 13.? + 3 = 16
  14. 14.2 + 15 =
  15. 15.5 + 5 + 7 =
  16. 16.3 + 2 =
  17. 17.12 + 8 =
  18. 18.? + 3 = 14
  19. 19.There are 2 red flowers and 15 white flowers. How many flowers are there in all?
  20. 20.Kavya has 10 books and gets 7 books more. How many books does Kavya have now?
  21. 21.4 + 5 + 2 =
  22. 22.6 + 6 + 3 =
  23. 23.? + 13 = 17
  24. 24.There are 7 red beads and 7 yellow beads. How many beads are there in all?
  25. 25.14 + 4 =
  26. 26.There are 11 green flowers and 9 yellow flowers. How many flowers are there in all?
  27. 27.Isha has 8 flowers and gets 3 flowers more. How many flowers does Isha have now?
  28. 28.7 + 5 + 5 =
  29. 29.3 + 2 + 10 =
  30. 30.12 + 6 =
  31. 31.? + 1 = 10
  32. 32.5 + ? = 12
  33. 33.There are 6 green kites and 3 blue kites. How many kites are there in all?
  34. 34.3 + 2 + 8 =
  35. 35.16 + ? = 20
  36. 36.8 + 5 + 7 =
  37. 37.5 + 15 =
  38. 38.Tara has 6 pencils and gets 13 pencils more. How many pencils does Tara have now?
  39. 39.Kavya has 12 balls and gets 8 balls more. How many balls does Kavya have now?
  40. 40.3 + ? = 4

Answer key

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

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