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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 129 · 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.There are 11 red balloons and 4 blue balloons. How many balloons are there in all?
  2. 2.There are 2 yellow crayons and 16 pink crayons. How many crayons are there in all?
  3. 3.3 + 1 + 6 =
  4. 4.There are 4 red balloons and 14 yellow balloons. How many balloons are there in all?
  5. 5.Isha has 3 laddoos and gets 13 laddoos more. How many laddoos does Isha have now?
  6. 6.There are 8 white balloons and 11 yellow balloons. How many balloons are there in all?
  7. 7.5 + 2 + 13 =
  8. 8.7 + 7 + 1 =
  9. 9.2 + 6 + 4 =
  10. 10.? + 11 = 16
  11. 11.? + 2 = 12
  12. 12.There are 11 yellow crayons and 4 pink crayons. How many crayons are there in all?
  13. 13.There are 9 blue crayons and 11 yellow crayons. How many crayons are there in all?
  14. 14.Gurpreet has 13 flowers and gets 3 flowers more. How many flowers does Gurpreet have now?
  15. 15.17 + 3 =
  16. 16.There are 2 red beads and 9 white beads. How many beads are there in all?
  17. 17.Riya has 10 bananas and gets 7 bananas more. How many bananas does Riya have now?
  18. 18.There are 9 yellow kites and 7 red kites. How many kites are there in all?
  19. 19.? + 2 = 4
  20. 20.Isha has 10 mangoes and gets 7 mangoes more. How many mangoes does Isha have now?
  21. 21.2 + ? = 3
  22. 22.4 + 1 + 12 =
  23. 23.There are 10 blue balls and 5 green balls. How many balls are there in all?
  24. 24.Aarav has 15 flowers and gets 1 flower more. How many flowers does Aarav have now?
  25. 25.5 + ? = 14
  26. 26.? + 2 = 10
  27. 27.There are 10 blue flowers and 6 pink flowers. How many flowers are there in all?
  28. 28.? + 4 = 10
  29. 29.4 + ? = 11
  30. 30.8 + 1 + 9 =
  31. 31.Lakshmi has 2 crayons and gets 3 crayons more. How many crayons does Lakshmi have now?
  32. 32.4 + 8 =
  33. 33.17 + 1 =
  34. 34.2 + 6 =
  35. 35.Farhan has 9 books and gets 9 books more. How many books does Farhan have now?
  36. 36.6 + ? = 8
  37. 37.? + 11 = 14
  38. 38.There are 3 yellow balloons and 12 blue balloons. How many balloons are there in all?
  39. 39.7 + 7 + 4 =
  40. 40.6 + 3 + 3 =

Answer key

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

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