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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 149 · 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 + 10 =
  2. 2.5 + ? = 15
  3. 3.There are 3 red balls and 13 blue balls. How many balls are there in all?
  4. 4.18 + 2 =
  5. 5.? + 1 = 15
  6. 6.6 + 8 + 3 =
  7. 7.7 + 3 + 1 =
  8. 8.There are 4 pink flowers and 15 red flowers. How many flowers are there in all?
  9. 9.5 + 11 =
  10. 10.Kabir has 9 books and gets 5 books more. How many books does Kabir have now?
  11. 11.There are 8 yellow beads and 9 red beads. How many beads are there in all?
  12. 12.Gurpreet has 9 marbles and gets 6 marbles more. How many marbles does Gurpreet have now?
  13. 13.3 + ? = 10
  14. 14.There are 3 red crayons and 13 white crayons. How many crayons are there in all?
  15. 15.There are 7 blue flowers and 2 red flowers. How many flowers are there in all?
  16. 16.14 + 3 =
  17. 17.7 + 2 + 7 =
  18. 18.There are 5 blue beads and 2 red beads. How many beads are there in all?
  19. 19.16 + 4 =
  20. 20.1 + ? = 4
  21. 21.There are 10 pink balloons and 4 blue balloons. How many balloons are there in all?
  22. 22.Priya has 3 balls and gets 5 balls more. How many balls does Priya have now?
  23. 23.7 + 5 + 4 =
  24. 24.14 + 4 =
  25. 25.15 + 1 =
  26. 26.There are 12 pink balls and 3 white balls. How many balls are there in all?
  27. 27.? + 4 = 5
  28. 28.4 + 8 + 7 =
  29. 29.3 + 14 =
  30. 30.Riya has 7 balloons and gets 13 balloons more. How many balloons does Riya have now?
  31. 31.There are 12 yellow beads and 8 red beads. How many beads are there in all?
  32. 32.Ananya has 11 books and gets 7 books more. How many books does Ananya have now?
  33. 33.17 + 3 =
  34. 34.Priya has 2 shells and gets 8 shells more. How many shells does Priya have now?
  35. 35.5 + 6 =
  36. 36.15 + 5 =
  37. 37.3 + ? = 6
  38. 38.15 + 4 =
  39. 39.Kabir has 5 books and gets 1 book more. How many books does Kabir have now?
  40. 40.Ishaan has 2 books and gets 18 books more. How many books does Ishaan have now?

Answer key

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

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