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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 981 · 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 10 white balloons and 4 green balloons. How many balloons are there in all?
  2. 2.There are 7 blue kites and 7 green kites. How many kites are there in all?
  3. 3.2 + ? = 20
  4. 4.1 + 8 + 3 =
  5. 5.Rohan has 12 bananas and gets 2 bananas more. How many bananas does Rohan have now?
  6. 6.18 + 1 =
  7. 7.There are 3 blue kites and 4 pink kites. How many kites are there in all?
  8. 8.11 + 7 =
  9. 9.There are 7 blue beads and 6 yellow beads. How many beads are there in all?
  10. 10.7 + ? = 8
  11. 11.3 + 2 + 4 =
  12. 12.2 + 1 + 8 =
  13. 13.? + 1 = 9
  14. 14.2 + 2 + 10 =
  15. 15.? + 2 = 7
  16. 16.2 + 14 =
  17. 17.Ishaan has 5 mangoes and gets 7 mangoes more. How many mangoes does Ishaan have now?
  18. 18.4 + 10 =
  19. 19.5 + 3 + 11 =
  20. 20.6 + 8 + 1 =
  21. 21.Aditya has 5 mangoes and gets 7 mangoes more. How many mangoes does Aditya have now?
  22. 22.6 + 1 + 12 =
  23. 23.2 + 1 + 3 =
  24. 24.8 + 8 + 1 =
  25. 25.Lakshmi has 5 mangoes and gets 3 mangoes more. How many mangoes does Lakshmi have now?
  26. 26.Pooja has 2 balloons and gets 4 balloons more. How many balloons does Pooja have now?
  27. 27.15 + ? = 19
  28. 28.Riya has 5 bananas and gets 4 bananas more. How many bananas does Riya have now?
  29. 29.17 + 2 =
  30. 30.15 + ? = 16
  31. 31.Lakshmi has 3 books and gets 13 books more. How many books does Lakshmi have now?
  32. 32.9 + 3 =
  33. 33.1 + 1 + 10 =
  34. 34.There are 5 pink balloons and 14 white balloons. How many balloons are there in all?
  35. 35.18 + 2 =
  36. 36.8 + ? = 16
  37. 37.Priya has 14 balloons and gets 4 balloons more. How many balloons does Priya have now?
  38. 38.There are 11 red crayons and 9 white crayons. How many crayons are there in all?
  39. 39.19 + 1 =
  40. 40.Rohan has 14 shells and gets 2 shells more. How many shells does Rohan have now?

Answer key

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

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