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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 406 · 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. 1.6 + 3 + 10 =
  2. 2.14 + 1 =
  3. 3.2 + ? = 7
  4. 4.? + 10 = 14
  5. 5.2 + 2 + 5 =
  6. 6.There are 11 white flowers and 8 green flowers. How many flowers are there in all?
  7. 7.13 + 7 =
  8. 8.There are 9 pink balls and 5 red balls. How many balls are there in all?
  9. 9.? + 4 = 9
  10. 10.Gurpreet has 12 balloons and gets 1 balloon more. How many balloons does Gurpreet have now?
  11. 11.11 + 5 =
  12. 12.Pooja has 11 shells and gets 5 shells more. How many shells does Pooja have now?
  13. 13.12 + 7 =
  14. 14.1 + ? = 5
  15. 15.? + 4 = 18
  16. 16.Rohan has 9 shells and gets 3 shells more. How many shells does Rohan have now?
  17. 17.2 + 2 + 16 =
  18. 18.7 + 5 + 6 =
  19. 19.4 + 7 + 5 =
  20. 20.5 + 5 + 7 =
  21. 21.There are 12 blue crayons and 5 pink crayons. How many crayons are there in all?
  22. 22.5 + 8 =
  23. 23.There are 5 red crayons and 11 pink crayons. How many crayons are there in all?
  24. 24.? + 4 = 7
  25. 25.18 + 1 =
  26. 26.5 + ? = 19
  27. 27.2 + 1 =
  28. 28.9 + 8 =
  29. 29.9 + 7 =
  30. 30.Pooja has 4 mangoes and gets 2 mangoes more. How many mangoes does Pooja have now?
  31. 31.Zoya has 8 shells and gets 2 shells more. How many shells does Zoya have now?
  32. 32.There are 2 red balls and 14 green balls. How many balls are there in all?
  33. 33.3 + 7 + 9 =
  34. 34.7 + 7 + 3 =
  35. 35.Rahul has 7 kites and gets 11 kites more. How many kites does Rahul have now?
  36. 36.4 + 16 =
  37. 37.7 + 4 + 9 =
  38. 38.7 + 2 + 11 =
  39. 39.1 + 4 + 8 =
  40. 40.Diya has 3 balls and gets 11 balls more. How many balls does Diya have now?

Answer key

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

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