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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 498 · 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. 1.14 + 5 =
  2. 2.19 + 1 =
  3. 3.8 + ? = 9
  4. 4.16 + 2 =
  5. 5.1 + 8 + 4 =
  6. 6.There are 8 pink beads and 4 red beads. How many beads are there in all?
  7. 7.15 + 1 =
  8. 8.18 + 1 =
  9. 9.8 + 3 =
  10. 10.6 + 2 =
  11. 11.1 + ? = 13
  12. 12.2 + 4 + 8 =
  13. 13.There are 12 yellow flowers and 2 red flowers. How many flowers are there in all?
  14. 14.3 + 2 =
  15. 15.Kabir has 14 bananas and gets 2 bananas more. How many bananas does Kabir have now?
  16. 16.? + 2 = 6
  17. 17.1 + 1 + 1 =
  18. 18.6 + 8 + 3 =
  19. 19.There are 9 red balloons and 3 blue balloons. How many balloons are there in all?
  20. 20.There are 9 pink balloons and 9 blue balloons. How many balloons are there in all?
  21. 21.5 + 8 + 4 =
  22. 22.There are 8 blue balloons and 5 green balloons. How many balloons are there in all?
  23. 23.There are 10 red flowers and 9 yellow flowers. How many flowers are there in all?
  24. 24.? + 1 = 16
  25. 25.3 + 2 + 1 =
  26. 26.There are 6 red balloons and 6 pink balloons. How many balloons are there in all?
  27. 27.5 + 5 =
  28. 28.7 + 5 + 5 =
  29. 29.3 + 4 =
  30. 30.? + 8 = 17
  31. 31.2 + ? = 18
  32. 32.1 + 4 =
  33. 33.2 + 4 + 1 =
  34. 34.8 + 6 + 3 =
  35. 35.9 + 1 =
  36. 36.There are 2 red balls and 14 green balls. How many balls are there in all?
  37. 37.3 + ? = 5
  38. 38.Rohan has 12 balloons and gets 5 balloons more. How many balloons does Rohan have now?
  39. 39.8 + 8 + 1 =
  40. 40.6 + 6 =

Answer key

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

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