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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 377 · 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.Farhan has 5 shells and gets 12 shells more. How many shells does Farhan have now?
  2. 2.3 + 3 + 1 =
  3. 3.There are 7 green crayons and 2 white crayons. How many crayons are there in all?
  4. 4.6 + 6 =
  5. 5.18 + 2 =
  6. 6.There are 10 white flowers and 5 green flowers. How many flowers are there in all?
  7. 7.6 + 4 + 7 =
  8. 8.15 + 3 =
  9. 9.19 + 1 =
  10. 10.15 + 4 =
  11. 11.7 + 2 =
  12. 12.9 + 8 =
  13. 13.1 + 2 =
  14. 14.16 + 4 =
  15. 15.Manav has 6 pencils and gets 9 pencils more. How many pencils does Manav have now?
  16. 16.Nisha has 14 flowers and gets 5 flowers more. How many flowers does Nisha have now?
  17. 17.2 + 17 =
  18. 18.? + 4 = 15
  19. 19.5 + 2 + 7 =
  20. 20.? + 5 = 12
  21. 21.9 + ? = 19
  22. 22.There are 3 white kites and 3 green kites. How many kites are there in all?
  23. 23.4 + 3 + 1 =
  24. 24.? + 1 = 9
  25. 25.Ishaan has 14 balls and gets 5 balls more. How many balls does Ishaan have now?
  26. 26.Ananya has 12 pencils and gets 3 pencils more. How many pencils does Ananya have now?
  27. 27.7 + 5 + 3 =
  28. 28.10 + 4 =
  29. 29.There are 7 blue beads and 6 white beads. How many beads are there in all?
  30. 30.? + 4 = 16
  31. 31.5 + ? = 10
  32. 32.1 + ? = 4
  33. 33.There are 11 white flowers and 8 red flowers. How many flowers are there in all?
  34. 34.3 + 1 + 6 =
  35. 35.Farhan has 9 balls and gets 5 balls more. How many balls does Farhan have now?
  36. 36.14 + ? = 19
  37. 37.Aditya has 11 crayons and gets 9 crayons more. How many crayons does Aditya have now?
  38. 38.? + 2 = 16
  39. 39.5 + 7 + 5 =
  40. 40.There are 3 yellow balloons and 7 blue balloons. How many balloons are there in all?

Answer key

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

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