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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 122 · 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 + 5 + 6 =
  2. 2.4 + ? = 14
  3. 3.There are 10 green crayons and 4 yellow crayons. How many crayons are there in all?
  4. 4.? + 14 = 19
  5. 5.There are 10 red balls and 3 pink balls. How many balls are there in all?
  6. 6.3 + 1 =
  7. 7.13 + 7 =
  8. 8.6 + 4 =
  9. 9.Riya has 2 balloons and gets 4 balloons more. How many balloons does Riya have now?
  10. 10.17 + 3 =
  11. 11.? + 8 = 15
  12. 12.Nisha has 2 marbles and gets 3 marbles more. How many marbles does Nisha have now?
  13. 13.There are 2 white kites and 14 blue kites. How many kites are there in all?
  14. 14.8 + 1 + 6 =
  15. 15.There are 5 white kites and 8 green kites. How many kites are there in all?
  16. 16.Aditya has 12 marbles and gets 1 marble more. How many marbles does Aditya have now?
  17. 17.7 + 2 + 3 =
  18. 18.6 + 4 + 9 =
  19. 19.9 + ? = 14
  20. 20.? + 5 = 20
  21. 21.2 + 3 + 7 =
  22. 22.There are 5 blue flowers and 14 green flowers. How many flowers are there in all?
  23. 23.Gurpreet has 2 bananas and gets 2 bananas more. How many bananas does Gurpreet have now?
  24. 24.There are 6 pink balls and 7 blue balls. How many balls are there in all?
  25. 25.10 + 2 =
  26. 26.4 + 9 =
  27. 27.Arjun has 13 mangoes and gets 6 mangoes more. How many mangoes does Arjun have now?
  28. 28.Isha has 13 flowers and gets 3 flowers more. How many flowers does Isha have now?
  29. 29.Joseph has 4 mangoes and gets 4 mangoes more. How many mangoes does Joseph have now?
  30. 30.10 + 4 =
  31. 31.1 + 2 + 13 =
  32. 32.Kavya has 2 balls and gets 9 balls more. How many balls does Kavya have now?
  33. 33.1 + 13 =
  34. 34.? + 4 = 10
  35. 35.17 + 1 =
  36. 36.16 + 2 =
  37. 37.There are 3 white flowers and 13 red flowers. How many flowers are there in all?
  38. 38.? + 4 = 7
  39. 39.15 + 4 =
  40. 40.13 + ? = 19

Answer key

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

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