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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 51 · 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 8 red balls and 4 yellow balls. How many balls are there in all?
  2. 2.Aditya has 10 pencils and gets 8 pencils more. How many pencils does Aditya have now?
  3. 3.2 + 7 =
  4. 4.There are 4 pink crayons and 2 yellow crayons. How many crayons are there in all?
  5. 5.7 + 2 =
  6. 6.8 + 7 =
  7. 7.? + 1 = 11
  8. 8.14 + 6 =
  9. 9.16 + 1 =
  10. 10.Priya has 2 crayons and gets 11 crayons more. How many crayons does Priya have now?
  11. 11.? + 7 = 8
  12. 12.6 + 3 + 6 =
  13. 13.? + 3 = 6
  14. 14.8 + ? = 17
  15. 15.1 + ? = 4
  16. 16.7 + 10 =
  17. 17.7 + 3 + 7 =
  18. 18.There are 4 white crayons and 6 green crayons. How many crayons are there in all?
  19. 19.Arjun has 7 books and gets 1 book more. How many books does Arjun have now?
  20. 20.Saanvi has 9 bananas and gets 2 bananas more. How many bananas does Saanvi have now?
  21. 21.4 + ? = 6
  22. 22.8 + 3 + 7 =
  23. 23.5 + 7 + 1 =
  24. 24.There are 4 green kites and 4 white kites. How many kites are there in all?
  25. 25.There are 2 red flowers and 16 yellow flowers. How many flowers are there in all?
  26. 26.2 + ? = 16
  27. 27.Aditya has 2 balls and gets 5 balls more. How many balls does Aditya have now?
  28. 28.18 + 2 =
  29. 29.Farhan has 15 shells and gets 4 shells more. How many shells does Farhan have now?
  30. 30.There are 5 yellow crayons and 13 red crayons. How many crayons are there in all?
  31. 31.8 + 9 =
  32. 32.1 + ? = 19
  33. 33.Ananya has 5 books and gets 2 books more. How many books does Ananya have now?
  34. 34.There are 10 pink beads and 4 red beads. How many beads are there in all?
  35. 35.7 + ? = 9
  36. 36.3 + 15 =
  37. 37.3 + ? = 7
  38. 38.3 + 3 =
  39. 39.5 + 3 =
  40. 40.? + 6 = 9

Answer key

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

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