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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 42 · 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. 1.6 + 3 + 6 =
  2. 2.There are 3 red balloons and 17 green balloons. How many balloons are there in all?
  3. 3.? + 7 = 10
  4. 4.4 + ? = 14
  5. 5.9 + 8 =
  6. 6.12 + 6 =
  7. 7.There are 6 blue balloons and 5 green balloons. How many balloons are there in all?
  8. 8.? + 1 = 4
  9. 9.5 + ? = 7
  10. 10.6 + 4 + 7 =
  11. 11.Saanvi has 2 books and gets 17 books more. How many books does Saanvi have now?
  12. 12.10 + 2 =
  13. 13.There are 8 blue beads and 8 pink beads. How many beads are there in all?
  14. 14.3 + 6 + 2 =
  15. 15.? + 6 = 20
  16. 16.3 + 11 =
  17. 17.There are 2 yellow balloons and 8 green balloons. How many balloons are there in all?
  18. 18.? + 14 = 19
  19. 19.19 + 1 =
  20. 20.7 + 5 + 8 =
  21. 21.Vivaan has 9 pencils and gets 3 pencils more. How many pencils does Vivaan have now?
  22. 22.There are 12 red kites and 2 pink kites. How many kites are there in all?
  23. 23.2 + 5 + 4 =
  24. 24.5 + 5 + 7 =
  25. 25.3 + 2 + 2 =
  26. 26.2 + 2 + 5 =
  27. 27.9 + ? = 20
  28. 28.There are 5 blue kites and 4 white kites. How many kites are there in all?
  29. 29.7 + 7 + 1 =
  30. 30.Pooja has 15 balls and gets 3 balls more. How many balls does Pooja have now?
  31. 31.Aarav has 4 shells and gets 3 shells more. How many shells does Aarav have now?
  32. 32.4 + ? = 5
  33. 33.Dev has 13 balloons and gets 4 balloons more. How many balloons does Dev have now?
  34. 34.4 + 8 + 1 =
  35. 35.5 + 1 + 3 =
  36. 36.6 + 5 + 8 =
  37. 37.5 + 7 + 4 =
  38. 38.3 + 12 =
  39. 39.3 + 4 + 4 =
  40. 40.Arjun has 7 marbles and gets 6 marbles more. How many marbles does Arjun have now?

Answer key

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

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