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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 667 · 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 4 blue balloons and 11 white balloons. How many balloons are there in all?
  2. 2.5 + 2 + 6 =
  3. 3.? + 5 = 8
  4. 4.3 + ? = 5
  5. 5.There are 10 green balloons and 8 yellow balloons. How many balloons are there in all?
  6. 6.5 + 6 =
  7. 7.Isha has 2 books and gets 7 books more. How many books does Isha have now?
  8. 8.Aditya has 14 kites and gets 2 kites more. How many kites does Aditya have now?
  9. 9.Saanvi has 7 crayons and gets 11 crayons more. How many crayons does Saanvi have now?
  10. 10.Priya has 12 shells and gets 5 shells more. How many shells does Priya have now?
  11. 11.There are 9 white beads and 4 red beads. How many beads are there in all?
  12. 12.Ishaan has 11 books and gets 3 books more. How many books does Ishaan have now?
  13. 13.There are 9 blue kites and 3 yellow kites. How many kites are there in all?
  14. 14.18 + 2 =
  15. 15.18 + 1 =
  16. 16.3 + 13 =
  17. 17.? + 1 = 4
  18. 18.Kabir has 4 laddoos and gets 13 laddoos more. How many laddoos does Kabir have now?
  19. 19.1 + 2 + 12 =
  20. 20.? + 7 = 15
  21. 21.There are 12 white balls and 4 red balls. How many balls are there in all?
  22. 22.3 + ? = 12
  23. 23.2 + 8 + 10 =
  24. 24.Isha has 8 pencils and gets 10 pencils more. How many pencils does Isha have now?
  25. 25.Dev has 8 kites and gets 11 kites more. How many kites does Dev have now?
  26. 26.6 + 5 + 2 =
  27. 27.9 + 3 =
  28. 28.7 + 2 + 8 =
  29. 29.Manav has 13 marbles and gets 2 marbles more. How many marbles does Manav have now?
  30. 30.Manav has 15 kites and gets 1 kite more. How many kites does Manav have now?
  31. 31.4 + 15 =
  32. 32.Tara has 8 pencils and gets 9 pencils more. How many pencils does Tara have now?
  33. 33.3 + ? = 15
  34. 34.? + 7 = 11
  35. 35.7 + 10 =
  36. 36.Gurpreet has 2 books and gets 9 books more. How many books does Gurpreet have now?
  37. 37.3 + 2 + 7 =
  38. 38.4 + ? = 5
  39. 39.There are 5 white balls and 14 red balls. How many balls are there in all?
  40. 40.? + 15 = 19

Answer key

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

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