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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 728 · 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. 1.2 + ? = 15
  2. 2.2 + 6 + 4 =
  3. 3.There are 12 white balloons and 3 pink balloons. How many balloons are there in all?
  4. 4.Pooja has 9 flowers and gets 4 flowers more. How many flowers does Pooja have now?
  5. 5.There are 10 blue beads and 10 red beads. How many beads are there in all?
  6. 6.4 + 4 + 2 =
  7. 7.6 + 4 + 9 =
  8. 8.There are 12 red beads and 7 white beads. How many beads are there in all?
  9. 9.10 + 1 =
  10. 10.7 + 4 + 4 =
  11. 11.5 + 2 =
  12. 12.12 + 6 =
  13. 13.14 + 5 =
  14. 14.There are 4 yellow crayons and 11 green crayons. How many crayons are there in all?
  15. 15.6 + 6 + 4 =
  16. 16.10 + 5 =
  17. 17.5 + 7 + 1 =
  18. 18.3 + 5 =
  19. 19.13 + 4 =
  20. 20.5 + 1 =
  21. 21.14 + 6 =
  22. 22.Sneha has 9 shells and gets 10 shells more. How many shells does Sneha have now?
  23. 23.There are 10 yellow balloons and 4 pink balloons. How many balloons are there in all?
  24. 24.6 + 3 + 7 =
  25. 25.14 + ? = 17
  26. 26.There are 12 white flowers and 4 red flowers. How many flowers are there in all?
  27. 27.There are 4 red kites and 3 green kites. How many kites are there in all?
  28. 28.4 + 8 =
  29. 29.13 + 2 =
  30. 30.Ishaan has 3 crayons and gets 9 crayons more. How many crayons does Ishaan have now?
  31. 31.12 + ? = 18
  32. 32.5 + 8 + 5 =
  33. 33.? + 4 = 15
  34. 34.3 + 14 =
  35. 35.? + 6 = 12
  36. 36.4 + 1 + 11 =
  37. 37.2 + 4 + 14 =
  38. 38.3 + 11 =
  39. 39.1 + ? = 6
  40. 40.Diya has 6 shells and gets 12 shells more. How many shells does Diya have now?

Answer key

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

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