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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 166 · 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. 1.5 + 9 =
  2. 2.4 + 4 =
  3. 3.18 + 1 =
  4. 4.7 + 13 =
  5. 5.15 + 4 =
  6. 6.Rohan has 10 laddoos and gets 1 laddoo more. How many laddoos does Rohan have now?
  7. 7.6 + 6 + 4 =
  8. 8.5 + 14 =
  9. 9.1 + 19 =
  10. 10.There are 3 blue balls and 2 red balls. How many balls are there in all?
  11. 11.There are 11 blue beads and 9 white beads. How many beads are there in all?
  12. 12.5 + 3 + 2 =
  13. 13.8 + 7 + 3 =
  14. 14.Ananya has 12 balloons and gets 8 balloons more. How many balloons does Ananya have now?
  15. 15.1 + ? = 6
  16. 16.There are 9 yellow balloons and 11 blue balloons. How many balloons are there in all?
  17. 17.? + 3 = 19
  18. 18.4 + 7 =
  19. 19.16 + 3 =
  20. 20.17 + 1 =
  21. 21.7 + 5 + 2 =
  22. 22.There are 8 yellow crayons and 7 green crayons. How many crayons are there in all?
  23. 23.4 + 2 + 3 =
  24. 24.3 + 5 + 1 =
  25. 25.There are 4 green beads and 10 pink beads. How many beads are there in all?
  26. 26.18 + 2 =
  27. 27.12 + 3 =
  28. 28.There are 8 red beads and 8 green beads. How many beads are there in all?
  29. 29.1 + 13 =
  30. 30.4 + 1 + 8 =
  31. 31.There are 5 pink crayons and 8 red crayons. How many crayons are there in all?
  32. 32.10 + ? = 19
  33. 33.Manav has 4 marbles and gets 4 marbles more. How many marbles does Manav have now?
  34. 34.There are 11 pink beads and 2 red beads. How many beads are there in all?
  35. 35.9 + 10 =
  36. 36.3 + ? = 5
  37. 37.19 + 1 =
  38. 38.? + 2 = 3
  39. 39.15 + 1 =
  40. 40.There are 7 red flowers and 5 blue flowers. How many flowers are there in all?

Answer key

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

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