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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 375 · 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. 1.9 + 3 =
  2. 2.12 + 7 =
  3. 3.? + 10 = 15
  4. 4.Pooja has 15 kites and gets 2 kites more. How many kites does Pooja have now?
  5. 5.There are 3 pink crayons and 13 red crayons. How many crayons are there in all?
  6. 6.Ananya has 5 balloons and gets 15 balloons more. How many balloons does Ananya have now?
  7. 7.4 + 14 =
  8. 8.5 + 7 + 8 =
  9. 9.3 + 1 =
  10. 10.Nisha has 3 flowers and gets 16 flowers more. How many flowers does Nisha have now?
  11. 11.2 + 1 + 3 =
  12. 12.4 + ? = 20
  13. 13.There are 4 red balloons and 11 white balloons. How many balloons are there in all?
  14. 14.There are 6 yellow crayons and 6 blue crayons. How many crayons are there in all?
  15. 15.5 + 3 + 8 =
  16. 16.6 + 8 + 2 =
  17. 17.2 + 5 + 8 =
  18. 18.Nisha has 3 balls and gets 5 balls more. How many balls does Nisha have now?
  19. 19.Aarav has 11 books and gets 4 books more. How many books does Aarav have now?
  20. 20.There are 11 red balloons and 3 yellow balloons. How many balloons are there in all?
  21. 21.12 + 8 =
  22. 22.2 + 17 =
  23. 23.9 + 4 =
  24. 24.There are 7 blue balls and 13 yellow balls. How many balls are there in all?
  25. 25.2 + 4 =
  26. 26.There are 10 yellow balloons and 5 white balloons. How many balloons are there in all?
  27. 27.There are 4 pink balloons and 8 yellow balloons. How many balloons are there in all?
  28. 28.Isha has 15 pencils and gets 1 pencil more. How many pencils does Isha have now?
  29. 29.There are 10 green flowers and 9 white flowers. How many flowers are there in all?
  30. 30.6 + 6 + 2 =
  31. 31.Manav has 4 kites and gets 8 kites more. How many kites does Manav have now?
  32. 32.Kabir has 9 marbles and gets 3 marbles more. How many marbles does Kabir have now?
  33. 33.1 + 7 + 2 =
  34. 34.There are 4 green beads and 9 white beads. How many beads are there in all?
  35. 35.There are 11 red beads and 8 blue beads. How many beads are there in all?
  36. 36.5 + 5 =
  37. 37.? + 2 = 3
  38. 38.There are 9 pink beads and 4 yellow beads. How many beads are there in all?
  39. 39.9 + 1 =
  40. 40.7 + 6 + 6 =

Answer key

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

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