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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 966 · 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 4 blue flowers and 14 red flowers. How many flowers are there in all?
  2. 2.1 + 1 =
  3. 3.There are 4 green kites and 8 yellow kites. How many kites are there in all?
  4. 4.Riya has 2 mangoes and gets 8 mangoes more. How many mangoes does Riya have now?
  5. 5.? + 2 = 10
  6. 6.4 + ? = 5
  7. 7.1 + 4 + 11 =
  8. 8.6 + 7 + 3 =
  9. 9.? + 4 = 12
  10. 10.There are 11 green crayons and 4 yellow crayons. How many crayons are there in all?
  11. 11.There are 10 green flowers and 4 blue flowers. How many flowers are there in all?
  12. 12.There are 8 red beads and 11 green beads. How many beads are there in all?
  13. 13.5 + 1 + 1 =
  14. 14.7 + 4 =
  15. 15.19 + 1 =
  16. 16.Rahul has 15 books and gets 1 book more. How many books does Rahul have now?
  17. 17.6 + 8 + 3 =
  18. 18.? + 3 = 4
  19. 19.2 + ? = 6
  20. 20.9 + ? = 11
  21. 21.Zoya has 7 shells and gets 4 shells more. How many shells does Zoya have now?
  22. 22.4 + 11 =
  23. 23.3 + 4 + 3 =
  24. 24.There are 2 white flowers and 7 yellow flowers. How many flowers are there in all?
  25. 25.9 + 5 =
  26. 26.4 + 1 + 13 =
  27. 27.15 + 5 =
  28. 28.13 + 5 =
  29. 29.1 + ? = 4
  30. 30.There are 5 blue beads and 13 green beads. How many beads are there in all?
  31. 31.5 + 15 =
  32. 32.2 + 2 + 2 =
  33. 33.? + 9 = 16
  34. 34.There are 4 pink balloons and 4 green balloons. How many balloons are there in all?
  35. 35.5 + 8 =
  36. 36.1 + 3 + 4 =
  37. 37.? + 1 = 14
  38. 38.7 + 3 =
  39. 39.11 + 3 =
  40. 40.12 + 4 =

Answer key

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

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