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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 399 · 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.? + 2 = 3
  2. 2.There are 9 green kites and 6 red kites. How many kites are there in all?
  3. 3.? + 7 = 20
  4. 4.7 + 3 =
  5. 5.There are 8 blue balloons and 12 white balloons. How many balloons are there in all?
  6. 6.There are 6 blue kites and 9 red kites. How many kites are there in all?
  7. 7.9 + 7 =
  8. 8.There are 6 red kites and 9 blue kites. How many kites are there in all?
  9. 9.There are 11 yellow balls and 6 white balls. How many balls are there in all?
  10. 10.? + 7 = 11
  11. 11.Rohan has 10 balloons and gets 7 balloons more. How many balloons does Rohan have now?
  12. 12.4 + 2 + 4 =
  13. 13.There are 9 pink flowers and 3 green flowers. How many flowers are there in all?
  14. 14.8 + 7 =
  15. 15.11 + 6 =
  16. 16.8 + ? = 18
  17. 17.6 + 4 + 10 =
  18. 18.4 + 6 + 7 =
  19. 19.There are 10 red beads and 6 white beads. How many beads are there in all?
  20. 20.16 + 3 =
  21. 21.14 + 4 =
  22. 22.5 + 4 =
  23. 23.10 + 4 =
  24. 24.19 + 1 =
  25. 25.7 + 6 =
  26. 26.There are 10 blue balloons and 3 yellow balloons. How many balloons are there in all?
  27. 27.There are 10 green kites and 2 pink kites. How many kites are there in all?
  28. 28.There are 5 blue balls and 4 red balls. How many balls are there in all?
  29. 29.? + 3 = 5
  30. 30.2 + 6 + 7 =
  31. 31.? + 2 = 9
  32. 32.7 + 5 + 6 =
  33. 33.Kavya has 15 balloons and gets 3 balloons more. How many balloons does Kavya have now?
  34. 34.? + 5 = 12
  35. 35.There are 6 blue kites and 7 red kites. How many kites are there in all?
  36. 36.Vivaan has 3 mangoes and gets 10 mangoes more. How many mangoes does Vivaan have now?
  37. 37.2 + 4 + 1 =
  38. 38.Ananya has 3 crayons and gets 2 crayons more. How many crayons does Ananya have now?
  39. 39.Ishaan has 6 marbles and gets 9 marbles more. How many marbles does Ishaan have now?
  40. 40.17 + 2 =

Answer key

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

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