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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 704 · 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.There are 12 red balls and 6 yellow balls. How many balls are there in all?
  2. 2.7 + 7 + 4 =
  3. 3.5 + 8 + 1 =
  4. 4.? + 9 = 12
  5. 5.Tara has 5 marbles and gets 15 marbles more. How many marbles does Tara have now?
  6. 6.5 + 7 + 8 =
  7. 7.8 + 4 + 3 =
  8. 8.There are 4 pink balls and 8 blue balls. How many balls are there in all?
  9. 9.Zoya has 13 mangoes and gets 7 mangoes more. How many mangoes does Zoya have now?
  10. 10.13 + 2 =
  11. 11.4 + 8 + 4 =
  12. 12.14 + ? = 18
  13. 13.There are 2 green balls and 18 white balls. How many balls are there in all?
  14. 14.Isha has 2 marbles and gets 5 marbles more. How many marbles does Isha have now?
  15. 15.2 + ? = 19
  16. 16.There are 4 blue flowers and 5 pink flowers. How many flowers are there in all?
  17. 17.There are 3 green crayons and 6 white crayons. How many crayons are there in all?
  18. 18.18 + 2 =
  19. 19.There are 6 red crayons and 10 yellow crayons. How many crayons are there in all?
  20. 20.19 + 1 =
  21. 21.Kabir has 12 balloons and gets 1 balloon more. How many balloons does Kabir have now?
  22. 22.? + 3 = 19
  23. 23.8 + 10 =
  24. 24.? + 10 = 18
  25. 25.There are 11 white balloons and 9 red balloons. How many balloons are there in all?
  26. 26.17 + 3 =
  27. 27.6 + 5 =
  28. 28.4 + 6 + 2 =
  29. 29.There are 2 red balls and 4 green balls. How many balls are there in all?
  30. 30.There are 7 pink balloons and 4 blue balloons. How many balloons are there in all?
  31. 31.16 + 2 =
  32. 32.1 + 5 + 6 =
  33. 33.8 + 2 + 3 =
  34. 34.6 + 8 + 2 =
  35. 35.6 + 7 =
  36. 36.There are 6 green kites and 13 yellow kites. How many kites are there in all?
  37. 37.Isha has 6 flowers and gets 4 flowers more. How many flowers does Isha have now?
  38. 38.Nisha has 5 balloons and gets 1 balloon more. How many balloons does Nisha have now?
  39. 39.There are 9 red kites and 6 pink kites. How many kites are there in all?
  40. 40.3 + ? = 4

Answer key

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

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