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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 381 · 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. 1.3 + 1 + 5 =
  2. 2.? + 7 = 15
  3. 3.? + 9 = 13
  4. 4.Riya has 14 balloons and gets 6 balloons more. How many balloons does Riya have now?
  5. 5.5 + 12 =
  6. 6.Lakshmi has 13 marbles and gets 5 marbles more. How many marbles does Lakshmi have now?
  7. 7.1 + 4 + 13 =
  8. 8.5 + 8 + 5 =
  9. 9.There are 2 yellow kites and 12 white kites. How many kites are there in all?
  10. 10.7 + 7 + 5 =
  11. 11.7 + ? = 11
  12. 12.Ishaan has 14 kites and gets 2 kites more. How many kites does Ishaan have now?
  13. 13.19 + 1 =
  14. 14.8 + 11 =
  15. 15.There are 5 white crayons and 9 blue crayons. How many crayons are there in all?
  16. 16.Riya has 2 mangoes and gets 11 mangoes more. How many mangoes does Riya have now?
  17. 17.? + 3 = 19
  18. 18.Karan has 4 balls and gets 9 balls more. How many balls does Karan have now?
  19. 19.1 + 2 + 7 =
  20. 20.3 + 15 =
  21. 21.3 + 4 + 3 =
  22. 22.There are 7 pink balls and 3 green balls. How many balls are there in all?
  23. 23.Ishaan has 2 flowers and gets 18 flowers more. How many flowers does Ishaan have now?
  24. 24.2 + 7 =
  25. 25.17 + 1 =
  26. 26.Karan has 11 pencils and gets 7 pencils more. How many pencils does Karan have now?
  27. 27.15 + 4 =
  28. 28.Riya has 5 pencils and gets 7 pencils more. How many pencils does Riya have now?
  29. 29.1 + ? = 7
  30. 30.6 + 1 + 3 =
  31. 31.There are 11 green balls and 3 red balls. How many balls are there in all?
  32. 32.Meera has 9 balloons and gets 7 balloons more. How many balloons does Meera have now?
  33. 33.Tara has 2 balls and gets 11 balls more. How many balls does Tara have now?
  34. 34.1 + ? = 15
  35. 35.Priya has 9 bananas and gets 5 bananas more. How many bananas does Priya have now?
  36. 36.2 + 2 + 4 =
  37. 37.9 + 1 =
  38. 38.7 + 3 + 9 =
  39. 39.8 + 8 + 3 =
  40. 40.16 + 4 =

Answer key

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

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