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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 423 · 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.? + 2 = 10
  2. 2.1 + 7 + 7 =
  3. 3.1 + 3 + 1 =
  4. 4.There are 6 green flowers and 9 red flowers. How many flowers are there in all?
  5. 5.Rahul has 6 bananas and gets 6 bananas more. How many bananas does Rahul have now?
  6. 6.Isha has 3 crayons and gets 15 crayons more. How many crayons does Isha have now?
  7. 7.Aarav has 10 pencils and gets 10 pencils more. How many pencils does Aarav have now?
  8. 8.5 + 15 =
  9. 9.2 + ? = 6
  10. 10.There are 10 pink balloons and 7 green balloons. How many balloons are there in all?
  11. 11.10 + ? = 12
  12. 12.Arjun has 5 pencils and gets 8 pencils more. How many pencils does Arjun have now?
  13. 13.Priya has 15 shells and gets 5 shells more. How many shells does Priya have now?
  14. 14.There are 5 green flowers and 12 blue flowers. How many flowers are there in all?
  15. 15.There are 4 blue balls and 9 red balls. How many balls are there in all?
  16. 16.Aditya has 2 shells and gets 17 shells more. How many shells does Aditya have now?
  17. 17.4 + 5 =
  18. 18.There are 11 white balls and 6 blue balls. How many balls are there in all?
  19. 19.8 + ? = 12
  20. 20.4 + 7 + 7 =
  21. 21.10 + 2 =
  22. 22.15 + 5 =
  23. 23.3 + ? = 5
  24. 24.8 + 3 + 7 =
  25. 25.7 + 2 + 6 =
  26. 26.Ananya has 7 balls and gets 11 balls more. How many balls does Ananya have now?
  27. 27.Isha has 3 marbles and gets 11 marbles more. How many marbles does Isha have now?
  28. 28.Meera has 14 crayons and gets 4 crayons more. How many crayons does Meera have now?
  29. 29.There are 6 green flowers and 2 blue flowers. How many flowers are there in all?
  30. 30.2 + 1 + 8 =
  31. 31.1 + 16 =
  32. 32.7 + 3 + 2 =
  33. 33.11 + 3 =
  34. 34.There are 4 green crayons and 7 blue crayons. How many crayons are there in all?
  35. 35.4 + ? = 10
  36. 36.? + 3 = 14
  37. 37.18 + 1 =
  38. 38.2 + 7 + 6 =
  39. 39.Ishaan has 12 mangoes and gets 2 mangoes more. How many mangoes does Ishaan have now?
  40. 40.5 + 10 =

Answer key

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

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