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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 740 · 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. 1.1 + ? = 13
  2. 2.There are 7 green flowers and 10 pink flowers. How many flowers are there in all?
  3. 3.? + 2 = 20
  4. 4.2 + 6 + 10 =
  5. 5.4 + ? = 16
  6. 6.Priya has 8 bananas and gets 4 bananas more. How many bananas does Priya have now?
  7. 7.4 + 2 =
  8. 8.Rohan has 3 balloons and gets 11 balloons more. How many balloons does Rohan have now?
  9. 9.19 + 1 =
  10. 10.? + 8 = 12
  11. 11.7 + 10 =
  12. 12.Karan has 6 books and gets 13 books more. How many books does Karan have now?
  13. 13.? + 5 = 18
  14. 14.2 + 1 + 17 =
  15. 15.6 + 2 + 2 =
  16. 16.? + 9 = 17
  17. 17.There are 12 blue balloons and 5 green balloons. How many balloons are there in all?
  18. 18.There are 9 pink balls and 7 green balls. How many balls are there in all?
  19. 19.7 + 8 + 2 =
  20. 20.Karan has 6 balls and gets 13 balls more. How many balls does Karan have now?
  21. 21.? + 2 = 5
  22. 22.5 + 6 =
  23. 23.7 + 6 + 7 =
  24. 24.3 + 14 =
  25. 25.2 + ? = 6
  26. 26.8 + 5 + 1 =
  27. 27.1 + ? = 5
  28. 28.1 + 3 + 8 =
  29. 29.2 + ? = 3
  30. 30.8 + 10 =
  31. 31.8 + 2 + 7 =
  32. 32.There are 7 yellow balls and 11 red balls. How many balls are there in all?
  33. 33.17 + 2 =
  34. 34.4 + 12 =
  35. 35.5 + 14 =
  36. 36.2 + 8 + 9 =
  37. 37.Vivaan has 8 bananas and gets 8 bananas more. How many bananas does Vivaan have now?
  38. 38.There are 11 red balls and 7 yellow balls. How many balls are there in all?
  39. 39.6 + 1 + 8 =
  40. 40.5 + ? = 15

Answer key

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

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