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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 32 · 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. 1.13 + 1 =
  2. 2.? + 8 = 20
  3. 3.5 + 6 + 3 =
  4. 4.Arjun has 15 laddoos and gets 4 laddoos more. How many laddoos does Arjun have now?
  5. 5.8 + 7 + 5 =
  6. 6.Ananya has 12 laddoos and gets 1 laddoo more. How many laddoos does Ananya have now?
  7. 7.1 + 1 + 4 =
  8. 8.7 + 3 + 4 =
  9. 9.Aarav has 2 marbles and gets 12 marbles more. How many marbles does Aarav have now?
  10. 10.8 + ? = 15
  11. 11.12 + 5 =
  12. 12.There are 2 yellow beads and 12 pink beads. How many beads are there in all?
  13. 13.There are 5 yellow balloons and 10 green balloons. How many balloons are there in all?
  14. 14.2 + ? = 8
  15. 15.10 + 3 =
  16. 16.? + 8 = 9
  17. 17.There are 3 green crayons and 13 yellow crayons. How many crayons are there in all?
  18. 18.4 + ? = 18
  19. 19.Isha has 8 marbles and gets 4 marbles more. How many marbles does Isha have now?
  20. 20.There are 12 green beads and 3 white beads. How many beads are there in all?
  21. 21.7 + 8 + 2 =
  22. 22.There are 7 white balloons and 2 blue balloons. How many balloons are there in all?
  23. 23.6 + 6 + 2 =
  24. 24.Arjun has 3 pencils and gets 10 pencils more. How many pencils does Arjun have now?
  25. 25.2 + 6 =
  26. 26.Aarav has 8 marbles and gets 9 marbles more. How many marbles does Aarav have now?
  27. 27.7 + 9 =
  28. 28.There are 2 white balloons and 10 red balloons. How many balloons are there in all?
  29. 29.8 + 2 + 8 =
  30. 30.? + 1 = 8
  31. 31.There are 6 red balls and 10 yellow balls. How many balls are there in all?
  32. 32.1 + 2 + 10 =
  33. 33.Ananya has 11 bananas and gets 5 bananas more. How many bananas does Ananya have now?
  34. 34.6 + 7 + 2 =
  35. 35.? + 1 = 9
  36. 36.8 + 3 + 6 =
  37. 37.6 + 14 =
  38. 38.3 + ? = 14
  39. 39.Ananya has 11 mangoes and gets 3 mangoes more. How many mangoes does Ananya have now?
  40. 40.2 + ? = 12

Answer key

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

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