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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 437 · 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. 1.3 + 8 + 3 =
  2. 2.? + 1 = 6
  3. 3.There are 4 yellow beads and 4 red beads. How many beads are there in all?
  4. 4.18 + 1 =
  5. 5.12 + 2 =
  6. 6.1 + 7 + 2 =
  7. 7.7 + ? = 12
  8. 8.Riya has 14 pencils and gets 4 pencils more. How many pencils does Riya have now?
  9. 9.13 + 4 =
  10. 10.? + 6 = 10
  11. 11.Aarav has 9 flowers and gets 8 flowers more. How many flowers does Aarav have now?
  12. 12.? + 1 = 13
  13. 13.There are 8 pink kites and 2 green kites. How many kites are there in all?
  14. 14.? + 2 = 9
  15. 15.4 + 2 + 7 =
  16. 16.There are 5 yellow balls and 2 blue balls. How many balls are there in all?
  17. 17.5 + 2 + 10 =
  18. 18.17 + 1 =
  19. 19.4 + ? = 6
  20. 20.17 + 3 =
  21. 21.2 + 6 =
  22. 22.? + 5 = 12
  23. 23.There are 12 red beads and 7 white beads. How many beads are there in all?
  24. 24.Farhan has 2 kites and gets 17 kites more. How many kites does Farhan have now?
  25. 25.4 + ? = 10
  26. 26.There are 7 blue balloons and 7 red balloons. How many balloons are there in all?
  27. 27.There are 3 pink balloons and 6 yellow balloons. How many balloons are there in all?
  28. 28.1 + ? = 19
  29. 29.2 + 1 + 7 =
  30. 30.5 + 6 =
  31. 31.Arjun has 13 laddoos and gets 3 laddoos more. How many laddoos does Arjun have now?
  32. 32.11 + 2 =
  33. 33.3 + 6 + 2 =
  34. 34.4 + 7 =
  35. 35.Rahul has 5 mangoes and gets 2 mangoes more. How many mangoes does Rahul have now?
  36. 36.? + 15 = 16
  37. 37.There are 12 red balls and 2 yellow balls. How many balls are there in all?
  38. 38.3 + 5 =
  39. 39.? + 7 = 9
  40. 40.1 + ? = 4

Answer key

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

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