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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 619 · 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. 1.3 + 5 + 1 =
  2. 2.5 + 15 =
  3. 3.17 + 1 =
  4. 4.There are 9 red balloons and 3 pink balloons. How many balloons are there in all?
  5. 5.Lakshmi has 2 bananas and gets 3 bananas more. How many bananas does Lakshmi have now?
  6. 6.There are 2 red flowers and 10 pink flowers. How many flowers are there in all?
  7. 7.There are 2 yellow balls and 4 white balls. How many balls are there in all?
  8. 8.Tara has 4 crayons and gets 14 crayons more. How many crayons does Tara have now?
  9. 9.There are 12 green crayons and 3 pink crayons. How many crayons are there in all?
  10. 10.5 + ? = 12
  11. 11.? + 2 = 7
  12. 12.6 + 5 =
  13. 13.2 + ? = 3
  14. 14.There are 12 white crayons and 5 green crayons. How many crayons are there in all?
  15. 15.12 + 7 =
  16. 16.? + 1 = 4
  17. 17.There are 12 pink beads and 4 red beads. How many beads are there in all?
  18. 18.? + 6 = 14
  19. 19.3 + 7 =
  20. 20.4 + ? = 6
  21. 21.Aditya has 4 marbles and gets 3 marbles more. How many marbles does Aditya have now?
  22. 22.2 + 6 + 1 =
  23. 23.? + 3 = 9
  24. 24.3 + 16 =
  25. 25.2 + 14 =
  26. 26.6 + 7 + 4 =
  27. 27.2 + 5 + 2 =
  28. 28.1 + ? = 5
  29. 29.Tara has 7 bananas and gets 7 bananas more. How many bananas does Tara have now?
  30. 30.2 + 1 + 14 =
  31. 31.13 + 3 =
  32. 32.2 + 7 + 2 =
  33. 33.9 + 4 =
  34. 34.? + 1 = 16
  35. 35.Arjun has 10 pencils and gets 8 pencils more. How many pencils does Arjun have now?
  36. 36.Aarav has 5 flowers and gets 4 flowers more. How many flowers does Aarav have now?
  37. 37.There are 12 blue balls and 3 white balls. How many balls are there in all?
  38. 38.1 + 2 + 2 =
  39. 39.16 + 1 =
  40. 40.6 + 1 + 2 =

Answer key

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

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