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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 505 · 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. 1.5 + 11 =
  2. 2.1 + 3 + 4 =
  3. 3.13 + 1 =
  4. 4.Tara has 4 marbles and gets 2 marbles more. How many marbles does Tara have now?
  5. 5.1 + ? = 7
  6. 6.7 + 3 + 2 =
  7. 7.Diya has 8 pencils and gets 8 pencils more. How many pencils does Diya have now?
  8. 8.There are 5 red kites and 10 green kites. How many kites are there in all?
  9. 9.6 + ? = 8
  10. 10.3 + 1 + 6 =
  11. 11.Tara has 8 flowers and gets 11 flowers more. How many flowers does Tara have now?
  12. 12.There are 7 white balloons and 8 green balloons. How many balloons are there in all?
  13. 13.Dev has 10 marbles and gets 7 marbles more. How many marbles does Dev have now?
  14. 14.2 + 2 + 8 =
  15. 15.11 + 3 =
  16. 16.There are 4 yellow beads and 12 white beads. How many beads are there in all?
  17. 17.Riya has 13 bananas and gets 3 bananas more. How many bananas does Riya have now?
  18. 18.1 + ? = 3
  19. 19.There are 3 green balls and 3 pink balls. How many balls are there in all?
  20. 20.3 + ? = 4
  21. 21.2 + ? = 3
  22. 22.3 + ? = 5
  23. 23.There are 7 blue beads and 8 pink beads. How many beads are there in all?
  24. 24.? + 8 = 13
  25. 25.Sneha has 15 crayons and gets 5 crayons more. How many crayons does Sneha have now?
  26. 26.? + 1 = 9
  27. 27.Farhan has 3 balls and gets 3 balls more. How many balls does Farhan have now?
  28. 28.There are 4 green balls and 9 red balls. How many balls are there in all?
  29. 29.1 + 2 + 12 =
  30. 30.14 + 3 =
  31. 31.5 + 7 =
  32. 32.3 + 3 + 5 =
  33. 33.Kabir has 6 kites and gets 10 kites more. How many kites does Kabir have now?
  34. 34.10 + 8 =
  35. 35.2 + 5 + 8 =
  36. 36.10 + ? = 15
  37. 37.Joseph has 10 mangoes and gets 9 mangoes more. How many mangoes does Joseph have now?
  38. 38.? + 13 = 15
  39. 39.5 + 8 =
  40. 40.17 + 1 =

Answer key

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

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