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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 323 · 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. 1.11 + 4 =
  2. 2.? + 3 = 14
  3. 3.3 + 5 =
  4. 4.16 + 1 =
  5. 5.? + 4 = 7
  6. 6.7 + 1 + 2 =
  7. 7.2 + 6 =
  8. 8.There are 3 green beads and 4 yellow beads. How many beads are there in all?
  9. 9.4 + ? = 6
  10. 10.2 + 5 + 10 =
  11. 11.There are 7 red flowers and 8 yellow flowers. How many flowers are there in all?
  12. 12.7 + 3 + 3 =
  13. 13.10 + 7 =
  14. 14.3 + 7 + 3 =
  15. 15.11 + 5 =
  16. 16.There are 10 yellow flowers and 4 red flowers. How many flowers are there in all?
  17. 17.There are 6 red kites and 10 yellow kites. How many kites are there in all?
  18. 18.Zoya has 6 mangoes and gets 9 mangoes more. How many mangoes does Zoya have now?
  19. 19.2 + 15 =
  20. 20.16 + 2 =
  21. 21.Rahul has 2 marbles and gets 9 marbles more. How many marbles does Rahul have now?
  22. 22.1 + ? = 18
  23. 23.There are 11 blue crayons and 6 pink crayons. How many crayons are there in all?
  24. 24.6 + 8 + 1 =
  25. 25.There are 2 pink beads and 16 blue beads. How many beads are there in all?
  26. 26.Pooja has 12 mangoes and gets 3 mangoes more. How many mangoes does Pooja have now?
  27. 27.Kabir has 5 books and gets 14 books more. How many books does Kabir have now?
  28. 28.6 + 1 + 12 =
  29. 29.Isha has 14 pencils and gets 3 pencils more. How many pencils does Isha have now?
  30. 30.19 + 1 =
  31. 31.8 + 6 =
  32. 32.Karan has 3 books and gets 1 book more. How many books does Karan have now?
  33. 33.Priya has 15 flowers and gets 1 flower more. How many flowers does Priya have now?
  34. 34.2 + ? = 15
  35. 35.There are 12 blue kites and 3 pink kites. How many kites are there in all?
  36. 36.Ishaan has 7 mangoes and gets 10 mangoes more. How many mangoes does Ishaan have now?
  37. 37.15 + 2 =
  38. 38.3 + 6 + 2 =
  39. 39.2 + 5 =
  40. 40.2 + 5 + 2 =

Answer key

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

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