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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 535 · 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. 1.9 + 9 =
  2. 2.1 + 1 =
  3. 3.4 + ? = 9
  4. 4.2 + 3 + 9 =
  5. 5.There are 4 green crayons and 16 pink crayons. How many crayons are there in all?
  6. 6.? + 15 = 16
  7. 7.Riya has 9 mangoes and gets 2 mangoes more. How many mangoes does Riya have now?
  8. 8.4 + 3 =
  9. 9.6 + ? = 17
  10. 10.10 + 6 =
  11. 11.Karan has 8 pencils and gets 11 pencils more. How many pencils does Karan have now?
  12. 12.7 + ? = 18
  13. 13.3 + 11 =
  14. 14.3 + 5 + 3 =
  15. 15.? + 7 = 13
  16. 16.Tara has 13 crayons and gets 2 crayons more. How many crayons does Tara have now?
  17. 17.Sneha has 9 crayons and gets 4 crayons more. How many crayons does Sneha have now?
  18. 18.1 + 5 + 12 =
  19. 19.5 + ? = 15
  20. 20.? + 6 = 20
  21. 21.Ishaan has 10 flowers and gets 10 flowers more. How many flowers does Ishaan have now?
  22. 22.There are 8 pink balloons and 8 white balloons. How many balloons are there in all?
  23. 23.2 + 1 =
  24. 24.? + 14 = 20
  25. 25.Manav has 12 kites and gets 4 kites more. How many kites does Manav have now?
  26. 26.6 + 8 + 6 =
  27. 27.Kavya has 7 marbles and gets 7 marbles more. How many marbles does Kavya have now?
  28. 28.There are 3 yellow flowers and 10 red flowers. How many flowers are there in all?
  29. 29.9 + 3 =
  30. 30.Meera has 4 pencils and gets 7 pencils more. How many pencils does Meera have now?
  31. 31.7 + 3 + 2 =
  32. 32.Tara has 4 books and gets 7 books more. How many books does Tara have now?
  33. 33.4 + ? = 20
  34. 34.1 + 1 + 3 =
  35. 35.Rahul has 5 flowers and gets 8 flowers more. How many flowers does Rahul have now?
  36. 36.12 + ? = 17
  37. 37.Diya has 5 kites and gets 5 kites more. How many kites does Diya have now?
  38. 38.Sneha has 13 balls and gets 6 balls more. How many balls does Sneha have now?
  39. 39.8 + 8 + 2 =
  40. 40.16 + 4 =

Answer key

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

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