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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 687 · 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 + 5 =
  2. 2.? + 4 = 12
  3. 3.8 + 8 + 1 =
  4. 4.2 + ? = 12
  5. 5.4 + 1 =
  6. 6.5 + 1 + 4 =
  7. 7.There are 3 yellow crayons and 10 pink crayons. How many crayons are there in all?
  8. 8.4 + 14 =
  9. 9.8 + 4 + 7 =
  10. 10.5 + 6 + 9 =
  11. 11.3 + 8 + 2 =
  12. 12.6 + 6 + 4 =
  13. 13.13 + 4 =
  14. 14.4 + 5 + 8 =
  15. 15.Kavya has 7 shells and gets 10 shells more. How many shells does Kavya have now?
  16. 16.2 + 7 =
  17. 17.There are 3 white balloons and 3 blue balloons. How many balloons are there in all?
  18. 18.8 + 7 =
  19. 19.Lakshmi has 7 balls and gets 2 balls more. How many balls does Lakshmi have now?
  20. 20.There are 9 green balls and 7 white balls. How many balls are there in all?
  21. 21.7 + 1 + 5 =
  22. 22.3 + 7 + 2 =
  23. 23.Farhan has 9 shells and gets 6 shells more. How many shells does Farhan have now?
  24. 24.7 + 7 + 2 =
  25. 25.There are 12 yellow balloons and 3 green balloons. How many balloons are there in all?
  26. 26.4 + 6 + 10 =
  27. 27.? + 7 = 9
  28. 28.There are 10 white beads and 9 pink beads. How many beads are there in all?
  29. 29.? + 5 = 14
  30. 30.There are 8 yellow beads and 7 red beads. How many beads are there in all?
  31. 31.There are 2 green beads and 14 white beads. How many beads are there in all?
  32. 32.Rohan has 8 laddoos and gets 2 laddoos more. How many laddoos does Rohan have now?
  33. 33.8 + 6 + 1 =
  34. 34.6 + 11 =
  35. 35.16 + 3 =
  36. 36.6 + 1 + 9 =
  37. 37.Lakshmi has 3 laddoos and gets 14 laddoos more. How many laddoos does Lakshmi have now?
  38. 38.2 + 4 + 3 =
  39. 39.10 + 5 =
  40. 40.8 + 3 + 2 =

Answer key

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

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