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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 453 · 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.There are 11 pink balls and 3 blue balls. How many balls are there in all?
  2. 2.16 + 2 =
  3. 3.Meera has 10 crayons and gets 6 crayons more. How many crayons does Meera have now?
  4. 4.6 + 2 =
  5. 5.Kabir has 13 mangoes and gets 6 mangoes more. How many mangoes does Kabir have now?
  6. 6.10 + ? = 15
  7. 7.Rahul has 8 books and gets 2 books more. How many books does Rahul have now?
  8. 8.15 + 5 =
  9. 9.There are 10 yellow beads and 4 blue beads. How many beads are there in all?
  10. 10.2 + 16 =
  11. 11.8 + 1 + 1 =
  12. 12.6 + 1 + 6 =
  13. 13.There are 3 blue beads and 6 white beads. How many beads are there in all?
  14. 14.5 + 5 =
  15. 15.10 + ? = 20
  16. 16.? + 4 = 11
  17. 17.19 + 1 =
  18. 18.There are 5 red beads and 13 green beads. How many beads are there in all?
  19. 19.There are 7 pink balloons and 13 blue balloons. How many balloons are there in all?
  20. 20.5 + 4 + 3 =
  21. 21.8 + 6 + 1 =
  22. 22.? + 3 = 13
  23. 23.1 + 1 + 7 =
  24. 24.8 + 8 + 3 =
  25. 25.There are 6 blue flowers and 7 white flowers. How many flowers are there in all?
  26. 26.17 + 2 =
  27. 27.Priya has 8 crayons and gets 12 crayons more. How many crayons does Priya have now?
  28. 28.1 + 1 + 14 =
  29. 29.12 + 8 =
  30. 30.4 + 6 + 3 =
  31. 31.17 + 1 =
  32. 32.There are 11 blue balls and 6 yellow balls. How many balls are there in all?
  33. 33.6 + 2 + 9 =
  34. 34.4 + 2 + 3 =
  35. 35.? + 1 = 9
  36. 36.Vivaan has 11 balloons and gets 5 balloons more. How many balloons does Vivaan have now?
  37. 37.7 + ? = 20
  38. 38.Kavya has 8 books and gets 2 books more. How many books does Kavya have now?
  39. 39.11 + ? = 18
  40. 40.Meera has 3 mangoes and gets 10 mangoes more. How many mangoes does Meera have now?

Answer key

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

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