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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 239 · 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 11 red balloons and 6 yellow balloons. How many balloons are there in all?
  2. 2.3 + 15 =
  3. 3.6 + 4 + 9 =
  4. 4.8 + 1 + 8 =
  5. 5.16 + 4 =
  6. 6.There are 9 red crayons and 7 blue crayons. How many crayons are there in all?
  7. 7.17 + 1 =
  8. 8.There are 3 blue kites and 4 pink kites. How many kites are there in all?
  9. 9.There are 6 pink crayons and 7 yellow crayons. How many crayons are there in all?
  10. 10.3 + 13 =
  11. 11.16 + 2 =
  12. 12.7 + 8 =
  13. 13.2 + 4 + 11 =
  14. 14.There are 8 red beads and 5 pink beads. How many beads are there in all?
  15. 15.1 + ? = 12
  16. 16.? + 5 = 10
  17. 17.3 + 5 + 5 =
  18. 18.Ananya has 4 mangoes and gets 16 mangoes more. How many mangoes does Ananya have now?
  19. 19.3 + 1 + 5 =
  20. 20.12 + 3 =
  21. 21.2 + 8 + 6 =
  22. 22.Aarav has 11 flowers and gets 3 flowers more. How many flowers does Aarav have now?
  23. 23.8 + 8 + 1 =
  24. 24.18 + 1 =
  25. 25.? + 1 = 5
  26. 26.11 + 2 =
  27. 27.4 + 5 + 8 =
  28. 28.1 + 3 + 1 =
  29. 29.There are 8 green beads and 8 blue beads. How many beads are there in all?
  30. 30.Vivaan has 14 balloons and gets 6 balloons more. How many balloons does Vivaan have now?
  31. 31.13 + 6 =
  32. 32.8 + 5 =
  33. 33.There are 4 blue kites and 9 pink kites. How many kites are there in all?
  34. 34.? + 2 = 6
  35. 35.1 + 8 + 9 =
  36. 36.? + 3 = 4
  37. 37.5 + 2 =
  38. 38.Arjun has 3 flowers and gets 4 flowers more. How many flowers does Arjun have now?
  39. 39.? + 4 = 5
  40. 40.There are 11 green beads and 6 pink beads. How many beads are there in all?

Answer key

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

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