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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 561 · 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 = 17
  2. 2.11 + ? = 15
  3. 3.Karan has 6 crayons and gets 13 crayons more. How many crayons does Karan have now?
  4. 4.16 + ? = 20
  5. 5.6 + 4 + 1 =
  6. 6.5 + 7 + 6 =
  7. 7.There are 10 red balls and 10 pink balls. How many balls are there in all?
  8. 8.1 + ? = 3
  9. 9.8 + 4 + 8 =
  10. 10.7 + 4 + 8 =
  11. 11.Aarav has 14 flowers and gets 6 flowers more. How many flowers does Aarav have now?
  12. 12.14 + ? = 18
  13. 13.There are 4 blue balloons and 11 white balloons. How many balloons are there in all?
  14. 14.5 + 3 + 1 =
  15. 15.Gurpreet has 5 laddoos and gets 8 laddoos more. How many laddoos does Gurpreet have now?
  16. 16.There are 7 white balloons and 7 yellow balloons. How many balloons are there in all?
  17. 17.18 + 2 =
  18. 18.? + 11 = 15
  19. 19.Rahul has 2 laddoos and gets 14 laddoos more. How many laddoos does Rahul have now?
  20. 20.Pooja has 7 pencils and gets 3 pencils more. How many pencils does Pooja have now?
  21. 21.There are 2 yellow beads and 9 white beads. How many beads are there in all?
  22. 22.1 + 2 + 16 =
  23. 23.There are 11 red balloons and 8 yellow balloons. How many balloons are there in all?
  24. 24.6 + 5 + 3 =
  25. 25.There are 4 blue balloons and 14 pink balloons. How many balloons are there in all?
  26. 26.Aditya has 6 balls and gets 8 balls more. How many balls does Aditya have now?
  27. 27.18 + 1 =
  28. 28.Sneha has 14 laddoos and gets 6 laddoos more. How many laddoos does Sneha have now?
  29. 29.There are 4 blue kites and 12 white kites. How many kites are there in all?
  30. 30.16 + 4 =
  31. 31.3 + ? = 13
  32. 32.3 + 7 + 4 =
  33. 33.Priya has 7 balloons and gets 4 balloons more. How many balloons does Priya have now?
  34. 34.2 + 6 + 5 =
  35. 35.6 + ? = 15
  36. 36.There are 8 green flowers and 12 white flowers. How many flowers are there in all?
  37. 37.5 + 4 + 7 =
  38. 38.4 + 2 + 3 =
  39. 39.2 + 1 + 9 =
  40. 40.Rahul has 10 mangoes and gets 2 mangoes more. How many mangoes does Rahul have now?

Answer key

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

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