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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 909 · 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.? + 7 = 13
  2. 2.8 + 6 + 2 =
  3. 3.There are 11 yellow flowers and 2 pink flowers. How many flowers are there in all?
  4. 4.Saanvi has 12 marbles and gets 6 marbles more. How many marbles does Saanvi have now?
  5. 5.There are 10 green crayons and 5 white crayons. How many crayons are there in all?
  6. 6.5 + 10 =
  7. 7.8 + 2 + 5 =
  8. 8.10 + 7 =
  9. 9.4 + 7 + 1 =
  10. 10.Isha has 9 laddoos and gets 6 laddoos more. How many laddoos does Isha have now?
  11. 11.2 + ? = 7
  12. 12.16 + 4 =
  13. 13.There are 11 red balls and 7 green balls. How many balls are there in all?
  14. 14.Gurpreet has 4 books and gets 7 books more. How many books does Gurpreet have now?
  15. 15.7 + 10 =
  16. 16.6 + 8 + 2 =
  17. 17.? + 10 = 20
  18. 18.7 + 6 + 5 =
  19. 19.6 + 4 =
  20. 20.? + 2 = 7
  21. 21.17 + 1 =
  22. 22.4 + 3 + 4 =
  23. 23.11 + 3 =
  24. 24.There are 4 blue balloons and 16 green balloons. How many balloons are there in all?
  25. 25.There are 11 white crayons and 3 blue crayons. How many crayons are there in all?
  26. 26.? + 1 = 7
  27. 27.There are 12 green crayons and 4 yellow crayons. How many crayons are there in all?
  28. 28.Isha has 12 kites and gets 5 kites more. How many kites does Isha have now?
  29. 29.There are 9 pink beads and 2 red beads. How many beads are there in all?
  30. 30.Lakshmi has 8 pencils and gets 12 pencils more. How many pencils does Lakshmi have now?
  31. 31.Saanvi has 13 mangoes and gets 4 mangoes more. How many mangoes does Saanvi have now?
  32. 32.? + 1 = 16
  33. 33.Aarav has 7 flowers and gets 7 flowers more. How many flowers does Aarav have now?
  34. 34.7 + ? = 9
  35. 35.There are 3 white crayons and 11 green crayons. How many crayons are there in all?
  36. 36.1 + ? = 3
  37. 37.There are 3 blue crayons and 5 red crayons. How many crayons are there in all?
  38. 38.13 + 5 =
  39. 39.2 + ? = 3
  40. 40.3 + 6 =

Answer key

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

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