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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 651 · 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. 1.2 + 18 =
  2. 2.18 + 1 =
  3. 3.There are 4 yellow flowers and 16 red flowers. How many flowers are there in all?
  4. 4.2 + ? = 9
  5. 5.Dev has 11 balls and gets 2 balls more. How many balls does Dev have now?
  6. 6.There are 8 red beads and 10 blue beads. How many beads are there in all?
  7. 7.? + 2 = 4
  8. 8.14 + ? = 17
  9. 9.There are 9 green crayons and 4 red crayons. How many crayons are there in all?
  10. 10.3 + ? = 10
  11. 11.Aditya has 15 pencils and gets 2 pencils more. How many pencils does Aditya have now?
  12. 12.? + 2 = 6
  13. 13.There are 12 green crayons and 4 white crayons. How many crayons are there in all?
  14. 14.8 + 1 + 1 =
  15. 15.Ananya has 6 laddoos and gets 4 laddoos more. How many laddoos does Ananya have now?
  16. 16.1 + 1 + 5 =
  17. 17.Nisha has 3 pencils and gets 1 pencil more. How many pencils does Nisha have now?
  18. 18.5 + 10 =
  19. 19.There are 3 red balloons and 17 green balloons. How many balloons are there in all?
  20. 20.6 + 7 + 1 =
  21. 21.2 + 3 =
  22. 22.15 + 2 =
  23. 23.6 + 2 + 11 =
  24. 24.7 + 2 + 4 =
  25. 25.7 + 4 =
  26. 26.There are 3 yellow crayons and 3 pink crayons. How many crayons are there in all?
  27. 27.Joseph has 8 books and gets 9 books more. How many books does Joseph have now?
  28. 28.There are 10 red balls and 4 white balls. How many balls are there in all?
  29. 29.2 + 16 =
  30. 30.There are 5 blue balloons and 4 red balloons. How many balloons are there in all?
  31. 31.Aarav has 10 bananas and gets 3 bananas more. How many bananas does Aarav have now?
  32. 32.There are 12 green balls and 7 blue balls. How many balls are there in all?
  33. 33.There are 5 pink balloons and 2 blue balloons. How many balloons are there in all?
  34. 34.Saanvi has 15 bananas and gets 1 banana more. How many bananas does Saanvi have now?
  35. 35.4 + 9 =
  36. 36.? + 7 = 8
  37. 37.Sneha has 14 shells and gets 6 shells more. How many shells does Sneha have now?
  38. 38.? + 3 = 4
  39. 39.6 + 6 + 1 =
  40. 40.9 + 9 =

Answer key

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

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