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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 940 · 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 + ? = 18
  2. 2.3 + 15 =
  3. 3.4 + 4 + 10 =
  4. 4.? + 6 = 16
  5. 5.6 + 14 =
  6. 6.7 + 13 =
  7. 7.1 + 10 =
  8. 8.Diya has 7 kites and gets 2 kites more. How many kites does Diya have now?
  9. 9.6 + 3 + 7 =
  10. 10.Aarav has 11 crayons and gets 4 crayons more. How many crayons does Aarav have now?
  11. 11.? + 5 = 7
  12. 12.Pooja has 3 crayons and gets 16 crayons more. How many crayons does Pooja have now?
  13. 13.3 + 4 + 3 =
  14. 14.1 + 11 =
  15. 15.Arjun has 8 shells and gets 2 shells more. How many shells does Arjun have now?
  16. 16.There are 3 white kites and 12 red kites. How many kites are there in all?
  17. 17.1 + 4 + 7 =
  18. 18.Aditya has 6 shells and gets 1 shell more. How many shells does Aditya have now?
  19. 19.There are 10 blue kites and 8 white kites. How many kites are there in all?
  20. 20.3 + ? = 17
  21. 21.? + 6 = 15
  22. 22.2 + 1 + 14 =
  23. 23.19 + 1 =
  24. 24.There are 2 white flowers and 6 green flowers. How many flowers are there in all?
  25. 25.12 + 7 =
  26. 26.8 + 5 + 2 =
  27. 27.Lakshmi has 4 mangoes and gets 13 mangoes more. How many mangoes does Lakshmi have now?
  28. 28.? + 2 = 14
  29. 29.18 + 1 =
  30. 30.6 + 6 + 2 =
  31. 31.2 + 2 + 6 =
  32. 32.5 + 6 + 5 =
  33. 33.9 + 2 =
  34. 34.There are 8 yellow balls and 3 blue balls. How many balls are there in all?
  35. 35.14 + 5 =
  36. 36.5 + 1 =
  37. 37.Rahul has 11 shells and gets 4 shells more. How many shells does Rahul have now?
  38. 38.There are 11 white balloons and 9 pink balloons. How many balloons are there in all?
  39. 39.There are 6 white beads and 11 pink beads. How many beads are there in all?
  40. 40.Priya has 4 kites and gets 7 kites more. How many kites does Priya have now?

Answer key

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

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