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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 312 · 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 2 white beads and 9 blue beads. How many beads are there in all?
  2. 2.2 + 4 =
  3. 3.? + 1 = 13
  4. 4.6 + 5 =
  5. 5.5 + 10 =
  6. 6.5 + 6 + 3 =
  7. 7.10 + 2 =
  8. 8.There are 5 yellow beads and 4 green beads. How many beads are there in all?
  9. 9.7 + 8 + 4 =
  10. 10.17 + 2 =
  11. 11.2 + ? = 3
  12. 12.Rahul has 8 pencils and gets 4 pencils more. How many pencils does Rahul have now?
  13. 13.Rohan has 2 bananas and gets 3 bananas more. How many bananas does Rohan have now?
  14. 14.2 + 4 + 12 =
  15. 15.Aarav has 4 flowers and gets 15 flowers more. How many flowers does Aarav have now?
  16. 16.There are 4 white beads and 16 red beads. How many beads are there in all?
  17. 17.6 + 7 =
  18. 18.2 + 7 + 4 =
  19. 19.5 + 3 + 2 =
  20. 20.9 + 8 =
  21. 21.? + 3 = 6
  22. 22.3 + 4 + 11 =
  23. 23.3 + 14 =
  24. 24.? + 1 = 4
  25. 25.7 + 3 + 2 =
  26. 26.? + 3 = 10
  27. 27.7 + 4 + 1 =
  28. 28.5 + 2 + 12 =
  29. 29.9 + ? = 13
  30. 30.6 + 6 + 3 =
  31. 31.There are 4 red flowers and 14 yellow flowers. How many flowers are there in all?
  32. 32.Kavya has 6 kites and gets 11 kites more. How many kites does Kavya have now?
  33. 33.1 + 7 + 8 =
  34. 34.3 + ? = 18
  35. 35.19 + 1 =
  36. 36.Tara has 15 mangoes and gets 1 mango more. How many mangoes does Tara have now?
  37. 37.6 + 1 + 13 =
  38. 38.Kavya has 7 flowers and gets 8 flowers more. How many flowers does Kavya have now?
  39. 39.? + 1 = 3
  40. 40.6 + 3 + 10 =

Answer key

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

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