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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 189 · 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. 1.1 + 13 =
  2. 2.There are 7 blue beads and 2 yellow beads. How many beads are there in all?
  3. 3.4 + 2 + 2 =
  4. 4.Kabir has 15 books and gets 3 books more. How many books does Kabir have now?
  5. 5.9 + 5 =
  6. 6.4 + ? = 17
  7. 7.There are 8 yellow flowers and 2 blue flowers. How many flowers are there in all?
  8. 8.4 + 6 + 5 =
  9. 9.10 + 8 =
  10. 10.2 + 3 =
  11. 11.There are 12 yellow beads and 5 white beads. How many beads are there in all?
  12. 12.There are 10 blue kites and 4 yellow kites. How many kites are there in all?
  13. 13.There are 8 red flowers and 7 pink flowers. How many flowers are there in all?
  14. 14.? + 17 = 19
  15. 15.16 + 4 =
  16. 16.Ishaan has 6 marbles and gets 4 marbles more. How many marbles does Ishaan have now?
  17. 17.There are 8 pink balloons and 6 green balloons. How many balloons are there in all?
  18. 18.1 + 3 + 2 =
  19. 19.4 + 8 =
  20. 20.6 + 4 + 2 =
  21. 21.8 + ? = 16
  22. 22.3 + 3 + 5 =
  23. 23.? + 1 = 6
  24. 24.1 + 3 + 12 =
  25. 25.3 + 1 =
  26. 26.Kabir has 5 flowers and gets 10 flowers more. How many flowers does Kabir have now?
  27. 27.7 + 1 + 2 =
  28. 28.? + 8 = 11
  29. 29.There are 4 pink balloons and 10 white balloons. How many balloons are there in all?
  30. 30.2 + 8 + 6 =
  31. 31.8 + 6 + 2 =
  32. 32.8 + 4 + 7 =
  33. 33.4 + ? = 19
  34. 34.5 + ? = 9
  35. 35.13 + 5 =
  36. 36.Kavya has 12 balloons and gets 4 balloons more. How many balloons does Kavya have now?
  37. 37.? + 5 = 7
  38. 38.? + 4 = 7
  39. 39.5 + 6 + 4 =
  40. 40.There are 9 pink balloons and 2 yellow balloons. How many balloons are there in all?

Answer key

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

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