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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 400 · 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. 1.13 + 5 =
  2. 2.18 + ? = 19
  3. 3.There are 10 yellow flowers and 3 blue flowers. How many flowers are there in all?
  4. 4.5 + 4 =
  5. 5.There are 8 blue balls and 3 yellow balls. How many balls are there in all?
  6. 6.7 + 10 =
  7. 7.5 + 13 =
  8. 8.7 + ? = 14
  9. 9.4 + 4 + 1 =
  10. 10.5 + 3 + 12 =
  11. 11.15 + 5 =
  12. 12.1 + 2 =
  13. 13.5 + 8 + 5 =
  14. 14.1 + 5 + 6 =
  15. 15.Rahul has 4 pencils and gets 3 pencils more. How many pencils does Rahul have now?
  16. 16.There are 8 blue kites and 4 yellow kites. How many kites are there in all?
  17. 17.There are 2 pink balloons and 13 red balloons. How many balloons are there in all?
  18. 18.14 + 4 =
  19. 19.? + 6 = 10
  20. 20.? + 1 = 5
  21. 21.Vivaan has 4 balloons and gets 5 balloons more. How many balloons does Vivaan have now?
  22. 22.13 + ? = 15
  23. 23.11 + 4 =
  24. 24.There are 10 pink beads and 8 red beads. How many beads are there in all?
  25. 25.There are 7 blue flowers and 12 green flowers. How many flowers are there in all?
  26. 26.6 + 2 + 12 =
  27. 27.3 + ? = 8
  28. 28.2 + ? = 3
  29. 29.? + 6 = 15
  30. 30.4 + 2 + 1 =
  31. 31.Arjun has 2 crayons and gets 7 crayons more. How many crayons does Arjun have now?
  32. 32.There are 12 blue kites and 4 pink kites. How many kites are there in all?
  33. 33.Saanvi has 5 crayons and gets 2 crayons more. How many crayons does Saanvi have now?
  34. 34.There are 11 green balloons and 2 white balloons. How many balloons are there in all?
  35. 35.Ishaan has 11 mangoes and gets 6 mangoes more. How many mangoes does Ishaan have now?
  36. 36.There are 3 red balloons and 11 blue balloons. How many balloons are there in all?
  37. 37.3 + 2 + 13 =
  38. 38.Aarav has 9 kites and gets 6 kites more. How many kites does Aarav have now?
  39. 39.18 + 2 =
  40. 40.4 + 6 + 8 =

Answer key

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

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