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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 146 · 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. 1.4 + 1 + 1 =
  2. 2.Isha has 4 books and gets 11 books more. How many books does Isha have now?
  3. 3.8 + 2 + 4 =
  4. 4.2 + 2 + 10 =
  5. 5.There are 10 pink balls and 2 white balls. How many balls are there in all?
  6. 6.Gurpreet has 10 laddoos and gets 8 laddoos more. How many laddoos does Gurpreet have now?
  7. 7.There are 10 green flowers and 5 pink flowers. How many flowers are there in all?
  8. 8.? + 3 = 4
  9. 9.There are 8 pink kites and 2 green kites. How many kites are there in all?
  10. 10.There are 2 red crayons and 10 yellow crayons. How many crayons are there in all?
  11. 11.1 + ? = 14
  12. 12.8 + 6 =
  13. 13.4 + 7 + 4 =
  14. 14.17 + 3 =
  15. 15.Lakshmi has 4 flowers and gets 3 flowers more. How many flowers does Lakshmi have now?
  16. 16.There are 6 pink flowers and 3 red flowers. How many flowers are there in all?
  17. 17.4 + 15 =
  18. 18.? + 4 = 6
  19. 19.5 + 9 =
  20. 20.3 + ? = 15
  21. 21.? + 1 = 5
  22. 22.There are 5 yellow crayons and 12 green crayons. How many crayons are there in all?
  23. 23.There are 7 pink balloons and 6 yellow balloons. How many balloons are there in all?
  24. 24.There are 3 blue balls and 4 green balls. How many balls are there in all?
  25. 25.1 + 9 =
  26. 26.? + 7 = 8
  27. 27.18 + 1 =
  28. 28.Kabir has 2 mangoes and gets 1 mango more. How many mangoes does Kabir have now?
  29. 29.? + 5 = 8
  30. 30.19 + 1 =
  31. 31.2 + 7 =
  32. 32.4 + 6 + 6 =
  33. 33.There are 3 green balls and 10 yellow balls. How many balls are there in all?
  34. 34.7 + 11 =
  35. 35.Aarav has 8 books and gets 4 books more. How many books does Aarav have now?
  36. 36.4 + 1 =
  37. 37.? + 6 = 17
  38. 38.12 + 5 =
  39. 39.? + 2 = 8
  40. 40.1 + 6 + 11 =

Answer key

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

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