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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 251 · 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.Kabir has 10 laddoos and gets 1 laddoo more. How many laddoos does Kabir have now?
  2. 2.There are 7 green flowers and 9 pink flowers. How many flowers are there in all?
  3. 3.8 + 2 + 7 =
  4. 4.2 + 16 =
  5. 5.10 + 7 =
  6. 6.Sneha has 13 flowers and gets 7 flowers more. How many flowers does Sneha have now?
  7. 7.8 + 2 =
  8. 8.Rahul has 9 balls and gets 8 balls more. How many balls does Rahul have now?
  9. 9.Riya has 8 pencils and gets 12 pencils more. How many pencils does Riya have now?
  10. 10.There are 2 blue balls and 2 red balls. How many balls are there in all?
  11. 11.4 + 15 =
  12. 12.1 + ? = 3
  13. 13.5 + 7 =
  14. 14.13 + ? = 15
  15. 15.? + 16 = 18
  16. 16.Tara has 15 pencils and gets 5 pencils more. How many pencils does Tara have now?
  17. 17.Lakshmi has 2 mangoes and gets 5 mangoes more. How many mangoes does Lakshmi have now?
  18. 18.Manav has 12 marbles and gets 8 marbles more. How many marbles does Manav have now?
  19. 19.There are 4 green balloons and 11 red balloons. How many balloons are there in all?
  20. 20.There are 11 yellow balloons and 5 blue balloons. How many balloons are there in all?
  21. 21.? + 17 = 19
  22. 22.Manav has 10 marbles and gets 5 marbles more. How many marbles does Manav have now?
  23. 23.17 + 1 =
  24. 24.There are 11 white beads and 2 yellow beads. How many beads are there in all?
  25. 25.7 + 9 =
  26. 26.17 + 2 =
  27. 27.3 + ? = 11
  28. 28.3 + 8 + 9 =
  29. 29.Rahul has 15 balloons and gets 1 balloon more. How many balloons does Rahul have now?
  30. 30.8 + 11 =
  31. 31.2 + 3 =
  32. 32.12 + 3 =
  33. 33.4 + ? = 13
  34. 34.18 + 2 =
  35. 35.5 + 6 + 3 =
  36. 36.5 + 5 + 2 =
  37. 37.Kavya has 15 crayons and gets 1 crayon more. How many crayons does Kavya have now?
  38. 38.There are 3 pink balloons and 11 yellow balloons. How many balloons are there in all?
  39. 39.1 + 13 =
  40. 40.2 + 8 + 1 =

Answer key

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

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