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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 919 · 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.? + 1 = 20
  2. 2.? + 4 = 10
  3. 3.There are 6 pink beads and 12 blue beads. How many beads are there in all?
  4. 4.16 + 3 =
  5. 5.Zoya has 5 shells and gets 1 shell more. How many shells does Zoya have now?
  6. 6.13 + 1 =
  7. 7.Isha has 13 crayons and gets 7 crayons more. How many crayons does Isha have now?
  8. 8.Nisha has 13 kites and gets 2 kites more. How many kites does Nisha have now?
  9. 9.1 + 18 =
  10. 10.13 + 5 =
  11. 11.Farhan has 15 marbles and gets 5 marbles more. How many marbles does Farhan have now?
  12. 12.8 + 1 =
  13. 13.3 + 10 =
  14. 14.? + 14 = 15
  15. 15.There are 3 yellow balloons and 3 blue balloons. How many balloons are there in all?
  16. 16.10 + 8 =
  17. 17.Lakshmi has 9 mangoes and gets 1 mango more. How many mangoes does Lakshmi have now?
  18. 18.Isha has 15 flowers and gets 2 flowers more. How many flowers does Isha have now?
  19. 19.2 + ? = 14
  20. 20.? + 6 = 7
  21. 21.2 + 13 =
  22. 22.Aarav has 15 balls and gets 5 balls more. How many balls does Aarav have now?
  23. 23.There are 11 blue balloons and 9 green balloons. How many balloons are there in all?
  24. 24.6 + 10 =
  25. 25.17 + 2 =
  26. 26.? + 1 = 5
  27. 27.There are 3 white balloons and 9 yellow balloons. How many balloons are there in all?
  28. 28.18 + 1 =
  29. 29.4 + ? = 12
  30. 30.1 + ? = 3
  31. 31.Joseph has 11 flowers and gets 2 flowers more. How many flowers does Joseph have now?
  32. 32.Manav has 12 balls and gets 3 balls more. How many balls does Manav have now?
  33. 33.Arjun has 9 books and gets 6 books more. How many books does Arjun have now?
  34. 34.14 + 4 =
  35. 35.7 + 2 + 4 =
  36. 36.There are 3 pink balloons and 9 blue balloons. How many balloons are there in all?
  37. 37.There are 7 yellow balloons and 10 red balloons. How many balloons are there in all?
  38. 38.? + 1 = 4
  39. 39.? + 6 = 10
  40. 40.Meera has 5 pencils and gets 3 pencils more. How many pencils does Meera have now?

Answer key

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

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