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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 397 · 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. 1.3 + 8 + 1 =
  2. 2.3 + 11 =
  3. 3.9 + 10 =
  4. 4.There are 5 red flowers and 5 green flowers. How many flowers are there in all?
  5. 5.3 + 10 =
  6. 6.5 + 3 =
  7. 7.There are 4 pink balloons and 3 red balloons. How many balloons are there in all?
  8. 8.1 + ? = 5
  9. 9.Kavya has 9 marbles and gets 11 marbles more. How many marbles does Kavya have now?
  10. 10.1 + 8 + 9 =
  11. 11.19 + 1 =
  12. 12.3 + 5 + 4 =
  13. 13.1 + 16 =
  14. 14.There are 10 blue flowers and 2 white flowers. How many flowers are there in all?
  15. 15.8 + 11 =
  16. 16.? + 4 = 14
  17. 17.? + 6 = 17
  18. 18.Gurpreet has 6 marbles and gets 1 marble more. How many marbles does Gurpreet have now?
  19. 19.There are 11 green beads and 9 white beads. How many beads are there in all?
  20. 20.13 + 3 =
  21. 21.1 + 6 + 3 =
  22. 22.6 + ? = 10
  23. 23.6 + 8 + 5 =
  24. 24.4 + 2 =
  25. 25.There are 9 green beads and 6 white beads. How many beads are there in all?
  26. 26.4 + 7 + 1 =
  27. 27.There are 6 pink flowers and 10 yellow flowers. How many flowers are there in all?
  28. 28.15 + 5 =
  29. 29.There are 7 white flowers and 5 red flowers. How many flowers are there in all?
  30. 30.4 + 6 + 9 =
  31. 31.4 + 7 + 4 =
  32. 32.1 + 6 =
  33. 33.2 + 5 + 10 =
  34. 34.There are 12 blue beads and 2 yellow beads. How many beads are there in all?
  35. 35.Kabir has 11 pencils and gets 2 pencils more. How many pencils does Kabir have now?
  36. 36.3 + 12 =
  37. 37.There are 5 green flowers and 14 red flowers. How many flowers are there in all?
  38. 38.8 + 3 + 2 =
  39. 39.8 + 6 + 6 =
  40. 40.Kabir has 12 shells and gets 6 shells more. How many shells does Kabir have now?

Answer key

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

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