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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 632 · 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. 1.1 + 7 + 2 =
  2. 2.7 + 1 + 10 =
  3. 3.? + 1 = 8
  4. 4.There are 2 green flowers and 6 red flowers. How many flowers are there in all?
  5. 5.Meera has 2 books and gets 6 books more. How many books does Meera have now?
  6. 6.8 + ? = 15
  7. 7.? + 1 = 4
  8. 8.There are 7 pink beads and 2 red beads. How many beads are there in all?
  9. 9.There are 11 white flowers and 7 yellow flowers. How many flowers are there in all?
  10. 10.2 + ? = 16
  11. 11.Dev has 3 laddoos and gets 9 laddoos more. How many laddoos does Dev have now?
  12. 12.4 + ? = 14
  13. 13.There are 11 blue flowers and 5 pink flowers. How many flowers are there in all?
  14. 14.There are 12 red beads and 7 pink beads. How many beads are there in all?
  15. 15.1 + 3 + 13 =
  16. 16.1 + 2 + 13 =
  17. 17.7 + 1 + 4 =
  18. 18.8 + 8 + 1 =
  19. 19.9 + 5 =
  20. 20.1 + 4 =
  21. 21.4 + ? = 10
  22. 22.11 + ? = 18
  23. 23.Aarav has 7 shells and gets 8 shells more. How many shells does Aarav have now?
  24. 24.17 + 1 =
  25. 25.4 + 2 + 11 =
  26. 26.2 + 2 + 6 =
  27. 27.There are 7 red kites and 8 green kites. How many kites are there in all?
  28. 28.? + 5 = 8
  29. 29.10 + 4 =
  30. 30.There are 11 yellow balls and 8 pink balls. How many balls are there in all?
  31. 31.7 + 8 + 2 =
  32. 32.1 + 3 =
  33. 33.8 + 6 + 4 =
  34. 34.There are 4 pink balloons and 5 yellow balloons. How many balloons are there in all?
  35. 35.4 + 6 + 7 =
  36. 36.10 + 1 =
  37. 37.3 + 1 =
  38. 38.15 + 4 =
  39. 39.? + 1 = 16
  40. 40.16 + 3 =

Answer key

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

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