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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 36 · 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. 1.14 + 3 =
  2. 2.12 + ? = 18
  3. 3.5 + 15 =
  4. 4.Zoya has 6 pencils and gets 6 pencils more. How many pencils does Zoya have now?
  5. 5.Karan has 10 books and gets 4 books more. How many books does Karan have now?
  6. 6.4 + 3 + 2 =
  7. 7.14 + 1 =
  8. 8.There are 3 pink flowers and 16 red flowers. How many flowers are there in all?
  9. 9.There are 8 pink beads and 3 yellow beads. How many beads are there in all?
  10. 10.There are 11 pink crayons and 8 white crayons. How many crayons are there in all?
  11. 11.Ishaan has 3 mangoes and gets 4 mangoes more. How many mangoes does Ishaan have now?
  12. 12.Farhan has 6 shells and gets 8 shells more. How many shells does Farhan have now?
  13. 13.? + 4 = 6
  14. 14.4 + 3 =
  15. 15.12 + 6 =
  16. 16.There are 11 yellow balls and 9 green balls. How many balls are there in all?
  17. 17.1 + ? = 3
  18. 18.16 + 1 =
  19. 19.Kavya has 6 pencils and gets 10 pencils more. How many pencils does Kavya have now?
  20. 20.18 + 1 =
  21. 21.? + 2 = 10
  22. 22.Rohan has 4 balls and gets 4 balls more. How many balls does Rohan have now?
  23. 23.1 + 2 + 15 =
  24. 24.7 + 1 + 8 =
  25. 25.12 + 8 =
  26. 26.17 + 1 =
  27. 27.There are 2 pink beads and 9 red beads. How many beads are there in all?
  28. 28.2 + 1 + 9 =
  29. 29.17 + 2 =
  30. 30.14 + 2 =
  31. 31.Karan has 10 marbles and gets 5 marbles more. How many marbles does Karan have now?
  32. 32.4 + ? = 15
  33. 33.? + 12 = 20
  34. 34.12 + 2 =
  35. 35.Rahul has 7 kites and gets 3 kites more. How many kites does Rahul have now?
  36. 36.6 + 4 + 2 =
  37. 37.6 + 13 =
  38. 38.There are 10 green flowers and 9 white flowers. How many flowers are there in all?
  39. 39.Ishaan has 14 kites and gets 5 kites more. How many kites does Ishaan have now?
  40. 40.Dev has 6 marbles and gets 6 marbles more. How many marbles does Dev have now?

Answer key

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

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