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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 77 · 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. 1.5 + 2 + 8 =
  2. 2.1 + ? = 14
  3. 3.13 + ? = 15
  4. 4.3 + 17 =
  5. 5.6 + 6 + 1 =
  6. 6.? + 1 = 15
  7. 7.8 + 1 + 1 =
  8. 8.Pooja has 9 books and gets 2 books more. How many books does Pooja have now?
  9. 9.Aditya has 14 marbles and gets 5 marbles more. How many marbles does Aditya have now?
  10. 10.14 + ? = 20
  11. 11.1 + 16 =
  12. 12.8 + 12 =
  13. 13.14 + ? = 17
  14. 14.There are 11 blue flowers and 4 red flowers. How many flowers are there in all?
  15. 15.Ananya has 5 crayons and gets 7 crayons more. How many crayons does Ananya have now?
  16. 16.Riya has 4 balls and gets 1 ball more. How many balls does Riya have now?
  17. 17.1 + 2 + 11 =
  18. 18.? + 3 = 5
  19. 19.? + 4 = 7
  20. 20.? + 6 = 12
  21. 21.5 + 1 + 7 =
  22. 22.Rohan has 6 books and gets 14 books more. How many books does Rohan have now?
  23. 23.There are 3 white crayons and 13 yellow crayons. How many crayons are there in all?
  24. 24.? + 6 = 11
  25. 25.Karan has 8 books and gets 5 books more. How many books does Karan have now?
  26. 26.There are 3 yellow balls and 11 white balls. How many balls are there in all?
  27. 27.5 + 13 =
  28. 28.Lakshmi has 4 mangoes and gets 11 mangoes more. How many mangoes does Lakshmi have now?
  29. 29.Nisha has 8 bananas and gets 7 bananas more. How many bananas does Nisha have now?
  30. 30.17 + 1 =
  31. 31.6 + 1 + 4 =
  32. 32.? + 1 = 18
  33. 33.There are 7 green crayons and 11 pink crayons. How many crayons are there in all?
  34. 34.19 + 1 =
  35. 35.9 + 5 =
  36. 36.7 + 3 + 5 =
  37. 37.7 + 1 =
  38. 38.Zoya has 3 shells and gets 1 shell more. How many shells does Zoya have now?
  39. 39.16 + 2 =
  40. 40.12 + 5 =

Answer key

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

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