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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 837 · 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 3 red flowers and 9 yellow flowers. How many flowers are there in all?
  2. 2.Karan has 12 balloons and gets 6 balloons more. How many balloons does Karan have now?
  3. 3.5 + 8 + 6 =
  4. 4.Aarav has 4 laddoos and gets 4 laddoos more. How many laddoos does Aarav have now?
  5. 5.11 + 4 =
  6. 6.5 + 3 + 1 =
  7. 7.There are 9 pink balls and 2 yellow balls. How many balls are there in all?
  8. 8.3 + 2 + 5 =
  9. 9.4 + ? = 7
  10. 10.6 + 8 + 4 =
  11. 11.There are 10 pink balls and 8 red balls. How many balls are there in all?
  12. 12.5 + ? = 11
  13. 13.13 + 2 =
  14. 14.3 + 8 + 3 =
  15. 15.Isha has 9 balloons and gets 4 balloons more. How many balloons does Isha have now?
  16. 16.3 + 2 =
  17. 17.2 + 5 + 9 =
  18. 18.6 + 3 + 1 =
  19. 19.5 + ? = 20
  20. 20.There are 9 red flowers and 9 blue flowers. How many flowers are there in all?
  21. 21.5 + 7 + 7 =
  22. 22.2 + 7 + 9 =
  23. 23.4 + 10 =
  24. 24.There are 3 red balloons and 16 yellow balloons. How many balloons are there in all?
  25. 25.1 + 7 + 1 =
  26. 26.There are 4 green flowers and 14 white flowers. How many flowers are there in all?
  27. 27.There are 12 green balls and 3 pink balls. How many balls are there in all?
  28. 28.? + 2 = 7
  29. 29.12 + 8 =
  30. 30.2 + 2 + 13 =
  31. 31.5 + 4 =
  32. 32.? + 10 = 12
  33. 33.6 + 4 =
  34. 34.19 + 1 =
  35. 35.5 + ? = 10
  36. 36.There are 2 blue balloons and 13 red balloons. How many balloons are there in all?
  37. 37.There are 6 yellow flowers and 3 white flowers. How many flowers are there in all?
  38. 38.15 + 3 =
  39. 39.2 + 16 =
  40. 40.Tara has 15 crayons and gets 4 crayons more. How many crayons does Tara have now?

Answer key

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

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