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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 433 · 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 + 1 + 2 =
  2. 2.2 + ? = 8
  3. 3.? + 2 = 11
  4. 4.Meera has 7 balls and gets 2 balls more. How many balls does Meera have now?
  5. 5.There are 2 green kites and 8 blue kites. How many kites are there in all?
  6. 6.? + 2 = 13
  7. 7.7 + 4 =
  8. 8.Meera has 4 pencils and gets 5 pencils more. How many pencils does Meera have now?
  9. 9.9 + 3 =
  10. 10.There are 6 white beads and 9 green beads. How many beads are there in all?
  11. 11.18 + 1 =
  12. 12.There are 3 green balloons and 2 yellow balloons. How many balloons are there in all?
  13. 13.6 + 7 + 7 =
  14. 14.? + 2 = 4
  15. 15.5 + 6 + 4 =
  16. 16.2 + 1 + 3 =
  17. 17.Joseph has 12 balloons and gets 8 balloons more. How many balloons does Joseph have now?
  18. 18.6 + 1 + 4 =
  19. 19.? + 1 = 3
  20. 20.16 + ? = 18
  21. 21.5 + 7 + 3 =
  22. 22.? + 1 = 11
  23. 23.Priya has 2 balloons and gets 5 balloons more. How many balloons does Priya have now?
  24. 24.Vivaan has 12 shells and gets 6 shells more. How many shells does Vivaan have now?
  25. 25.There are 4 pink flowers and 3 green flowers. How many flowers are there in all?
  26. 26.There are 12 pink flowers and 2 white flowers. How many flowers are there in all?
  27. 27.2 + 3 + 10 =
  28. 28.There are 6 blue kites and 3 green kites. How many kites are there in all?
  29. 29.Arjun has 12 bananas and gets 2 bananas more. How many bananas does Arjun have now?
  30. 30.Meera has 15 books and gets 1 book more. How many books does Meera have now?
  31. 31.Isha has 8 books and gets 12 books more. How many books does Isha have now?
  32. 32.12 + 7 =
  33. 33.1 + 8 + 1 =
  34. 34.5 + 1 + 3 =
  35. 35.Vivaan has 4 balls and gets 13 balls more. How many balls does Vivaan have now?
  36. 36.1 + ? = 4
  37. 37.9 + 1 =
  38. 38.4 + 5 + 1 =
  39. 39.6 + 14 =
  40. 40.6 + ? = 7

Answer key

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

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