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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 248 · 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. 1.4 + ? = 19
  2. 2.2 + 11 =
  3. 3.5 + 5 =
  4. 4.There are 9 red balloons and 11 blue balloons. How many balloons are there in all?
  5. 5.There are 12 white beads and 2 red beads. How many beads are there in all?
  6. 6.There are 3 blue balloons and 10 red balloons. How many balloons are there in all?
  7. 7.7 + 4 + 5 =
  8. 8.3 + 6 + 3 =
  9. 9.12 + 8 =
  10. 10.17 + 1 =
  11. 11.There are 10 pink balls and 3 blue balls. How many balls are there in all?
  12. 12.15 + ? = 18
  13. 13.2 + ? = 8
  14. 14.6 + 4 + 7 =
  15. 15.15 + 2 =
  16. 16.2 + 6 + 3 =
  17. 17.? + 2 = 3
  18. 18.4 + 9 =
  19. 19.8 + 9 =
  20. 20.1 + 6 + 11 =
  21. 21.Meera has 8 flowers and gets 5 flowers more. How many flowers does Meera have now?
  22. 22.Dev has 11 bananas and gets 7 bananas more. How many bananas does Dev have now?
  23. 23.5 + 2 + 2 =
  24. 24.? + 4 = 12
  25. 25.There are 12 pink flowers and 3 yellow flowers. How many flowers are there in all?
  26. 26.3 + 5 + 8 =
  27. 27.? + 7 = 11
  28. 28.3 + 6 + 1 =
  29. 29.5 + ? = 10
  30. 30.Rahul has 6 flowers and gets 2 flowers more. How many flowers does Rahul have now?
  31. 31.2 + ? = 3
  32. 32.8 + 3 + 6 =
  33. 33.10 + 4 =
  34. 34.3 + ? = 10
  35. 35.Zoya has 11 balloons and gets 4 balloons more. How many balloons does Zoya have now?
  36. 36.There are 2 green balloons and 15 pink balloons. How many balloons are there in all?
  37. 37.Lakshmi has 3 flowers and gets 7 flowers more. How many flowers does Lakshmi have now?
  38. 38.7 + 5 + 1 =
  39. 39.There are 12 green crayons and 2 pink crayons. How many crayons are there in all?
  40. 40.Tara has 12 bananas and gets 3 bananas more. How many bananas does Tara have now?

Answer key

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

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