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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 99 · 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 = 3
  2. 2.Isha has 6 balloons and gets 1 balloon more. How many balloons does Isha have now?
  3. 3.Kabir has 11 crayons and gets 6 crayons more. How many crayons does Kabir have now?
  4. 4.Rahul has 15 kites and gets 2 kites more. How many kites does Rahul have now?
  5. 5.Rohan has 12 balloons and gets 3 balloons more. How many balloons does Rohan have now?
  6. 6.? + 4 = 5
  7. 7.5 + 8 + 2 =
  8. 8.1 + ? = 9
  9. 9.19 + 1 =
  10. 10.Tara has 10 shells and gets 10 shells more. How many shells does Tara have now?
  11. 11.9 + ? = 12
  12. 12.6 + 4 =
  13. 13.There are 2 blue crayons and 15 white crayons. How many crayons are there in all?
  14. 14.? + 7 = 11
  15. 15.There are 11 green crayons and 9 pink crayons. How many crayons are there in all?
  16. 16.Karan has 7 balls and gets 3 balls more. How many balls does Karan have now?
  17. 17.There are 2 red flowers and 16 pink flowers. How many flowers are there in all?
  18. 18.1 + 8 + 1 =
  19. 19.1 + 7 + 9 =
  20. 20.8 + 4 =
  21. 21.Manav has 5 laddoos and gets 14 laddoos more. How many laddoos does Manav have now?
  22. 22.There are 7 red balls and 3 green balls. How many balls are there in all?
  23. 23.Gurpreet has 5 bananas and gets 11 bananas more. How many bananas does Gurpreet have now?
  24. 24.? + 1 = 5
  25. 25.? + 6 = 20
  26. 26.Rahul has 5 marbles and gets 1 marble more. How many marbles does Rahul have now?
  27. 27.1 + 7 =
  28. 28.Manav has 2 marbles and gets 3 marbles more. How many marbles does Manav have now?
  29. 29.8 + 3 + 4 =
  30. 30.Manav has 10 balls and gets 10 balls more. How many balls does Manav have now?
  31. 31.There are 9 yellow flowers and 5 red flowers. How many flowers are there in all?
  32. 32.1 + 1 + 11 =
  33. 33.? + 5 = 6
  34. 34.There are 5 pink crayons and 10 red crayons. How many crayons are there in all?
  35. 35.Aarav has 10 books and gets 4 books more. How many books does Aarav have now?
  36. 36.5 + ? = 20
  37. 37.5 + 5 =
  38. 38.Nisha has 5 books and gets 14 books more. How many books does Nisha have now?
  39. 39.13 + ? = 20
  40. 40.3 + 2 + 14 =

Answer key

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

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