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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 24 · 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 6 pink balloons and 11 green balloons. How many balloons are there in all?
  2. 2.There are 7 blue balls and 4 red balls. How many balls are there in all?
  3. 3.? + 10 = 14
  4. 4.Saanvi has 12 balloons and gets 4 balloons more. How many balloons does Saanvi have now?
  5. 5.7 + ? = 20
  6. 6.? + 1 = 7
  7. 7.14 + ? = 16
  8. 8.7 + 3 =
  9. 9.There are 5 white flowers and 7 green flowers. How many flowers are there in all?
  10. 10.16 + ? = 18
  11. 11.There are 11 white balloons and 5 green balloons. How many balloons are there in all?
  12. 12.There are 2 red beads and 18 green beads. How many beads are there in all?
  13. 13.There are 8 red crayons and 9 yellow crayons. How many crayons are there in all?
  14. 14.15 + 2 =
  15. 15.1 + 1 =
  16. 16.? + 1 = 6
  17. 17.5 + 7 =
  18. 18.Ishaan has 15 mangoes and gets 3 mangoes more. How many mangoes does Ishaan have now?
  19. 19.5 + 6 + 8 =
  20. 20.There are 2 blue kites and 2 green kites. How many kites are there in all?
  21. 21.? + 12 = 14
  22. 22.2 + 5 + 8 =
  23. 23.Isha has 13 mangoes and gets 4 mangoes more. How many mangoes does Isha have now?
  24. 24.There are 2 white balls and 2 blue balls. How many balls are there in all?
  25. 25.2 + 6 + 8 =
  26. 26.8 + 6 + 1 =
  27. 27.4 + 5 + 6 =
  28. 28.There are 12 red balloons and 2 pink balloons. How many balloons are there in all?
  29. 29.8 + 1 =
  30. 30.16 + 2 =
  31. 31.There are 3 white beads and 17 blue beads. How many beads are there in all?
  32. 32.7 + 5 + 7 =
  33. 33.19 + 1 =
  34. 34.There are 6 green flowers and 7 yellow flowers. How many flowers are there in all?
  35. 35.8 + ? = 15
  36. 36.6 + 14 =
  37. 37.Karan has 13 marbles and gets 7 marbles more. How many marbles does Karan have now?
  38. 38.8 + 1 + 2 =
  39. 39.Sneha has 15 balls and gets 5 balls more. How many balls does Sneha have now?
  40. 40.There are 9 red kites and 3 green kites. How many kites are there in all?

Answer key

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

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