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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 512 · 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.Isha has 4 marbles and gets 9 marbles more. How many marbles does Isha have now?
  2. 2.17 + 3 =
  3. 3.4 + ? = 12
  4. 4.8 + 10 =
  5. 5.2 + ? = 3
  6. 6.There are 10 blue flowers and 9 yellow flowers. How many flowers are there in all?
  7. 7.5 + 3 + 12 =
  8. 8.Pooja has 4 balloons and gets 11 balloons more. How many balloons does Pooja have now?
  9. 9.There are 4 blue balls and 2 white balls. How many balls are there in all?
  10. 10.There are 12 white kites and 4 green kites. How many kites are there in all?
  11. 11.There are 5 red kites and 8 blue kites. How many kites are there in all?
  12. 12.2 + 2 + 13 =
  13. 13.Karan has 13 mangoes and gets 4 mangoes more. How many mangoes does Karan have now?
  14. 14.1 + 6 =
  15. 15.Kabir has 11 kites and gets 2 kites more. How many kites does Kabir have now?
  16. 16.There are 5 yellow kites and 4 red kites. How many kites are there in all?
  17. 17.? + 2 = 3
  18. 18.? + 2 = 9
  19. 19.Lakshmi has 14 pencils and gets 4 pencils more. How many pencils does Lakshmi have now?
  20. 20.1 + 5 + 3 =
  21. 21.Priya has 14 shells and gets 6 shells more. How many shells does Priya have now?
  22. 22.? + 2 = 13
  23. 23.2 + 14 =
  24. 24.There are 11 red balls and 9 pink balls. How many balls are there in all?
  25. 25.? + 3 = 5
  26. 26.3 + 2 + 12 =
  27. 27.5 + 13 =
  28. 28.9 + 5 =
  29. 29.5 + ? = 19
  30. 30.There are 4 yellow flowers and 4 blue flowers. How many flowers are there in all?
  31. 31.? + 1 = 6
  32. 32.There are 3 red balloons and 4 white balloons. How many balloons are there in all?
  33. 33.12 + 5 =
  34. 34.There are 5 pink kites and 4 red kites. How many kites are there in all?
  35. 35.? + 17 = 20
  36. 36.There are 6 blue kites and 7 green kites. How many kites are there in all?
  37. 37.There are 5 red kites and 13 yellow kites. How many kites are there in all?
  38. 38.4 + 12 =
  39. 39.? + 1 = 12
  40. 40.16 + 2 =

Answer key

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

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