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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 497 · 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. 1.3 + 8 =
  2. 2.1 + 7 + 9 =
  3. 3.9 + 2 =
  4. 4.6 + 8 =
  5. 5.5 + 6 + 8 =
  6. 6.Joseph has 15 crayons and gets 5 crayons more. How many crayons does Joseph have now?
  7. 7.There are 4 yellow beads and 4 blue beads. How many beads are there in all?
  8. 8.7 + 2 + 5 =
  9. 9.7 + 7 + 3 =
  10. 10.Ananya has 6 balloons and gets 13 balloons more. How many balloons does Ananya have now?
  11. 11.There are 3 blue balloons and 6 green balloons. How many balloons are there in all?
  12. 12.There are 3 white beads and 7 red beads. How many beads are there in all?
  13. 13.6 + 2 + 5 =
  14. 14.8 + 5 + 2 =
  15. 15.Aarav has 11 crayons and gets 3 crayons more. How many crayons does Aarav have now?
  16. 16.Vivaan has 13 books and gets 1 book more. How many books does Vivaan have now?
  17. 17.16 + 4 =
  18. 18.5 + 2 + 9 =
  19. 19.There are 10 blue balloons and 5 red balloons. How many balloons are there in all?
  20. 20.There are 11 blue balloons and 7 pink balloons. How many balloons are there in all?
  21. 21.10 + 3 =
  22. 22.6 + ? = 7
  23. 23.7 + ? = 13
  24. 24.? + 6 = 19
  25. 25.11 + 6 =
  26. 26.3 + 10 =
  27. 27.14 + 3 =
  28. 28.5 + 2 + 6 =
  29. 29.1 + 3 + 9 =
  30. 30.There are 8 white beads and 7 red beads. How many beads are there in all?
  31. 31.? + 3 = 12
  32. 32.Gurpreet has 3 marbles and gets 16 marbles more. How many marbles does Gurpreet have now?
  33. 33.There are 12 blue balloons and 7 yellow balloons. How many balloons are there in all?
  34. 34.? + 2 = 3
  35. 35.9 + ? = 20
  36. 36.Diya has 12 balloons and gets 8 balloons more. How many balloons does Diya have now?
  37. 37.10 + 6 =
  38. 38.6 + 1 =
  39. 39.3 + 1 =
  40. 40.5 + 9 =

Answer key

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

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