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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 690 · 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 8 pink balls and 12 blue balls. How many balls are there in all?
  2. 2.4 + 2 + 9 =
  3. 3.Kabir has 2 mangoes and gets 15 mangoes more. How many mangoes does Kabir have now?
  4. 4.Saanvi has 3 pencils and gets 9 pencils more. How many pencils does Saanvi have now?
  5. 5.? + 2 = 20
  6. 6.There are 3 white beads and 2 red beads. How many beads are there in all?
  7. 7.16 + 4 =
  8. 8.There are 12 red balls and 5 blue balls. How many balls are there in all?
  9. 9.8 + ? = 10
  10. 10.Isha has 6 laddoos and gets 1 laddoo more. How many laddoos does Isha have now?
  11. 11.2 + 17 =
  12. 12.7 + 8 + 4 =
  13. 13.? + 5 = 8
  14. 14.6 + 1 + 11 =
  15. 15.Farhan has 15 kites and gets 5 kites more. How many kites does Farhan have now?
  16. 16.2 + ? = 6
  17. 17.4 + 7 =
  18. 18.Karan has 9 marbles and gets 2 marbles more. How many marbles does Karan have now?
  19. 19.5 + 8 =
  20. 20.5 + ? = 6
  21. 21.? + 2 = 6
  22. 22.2 + 4 =
  23. 23.There are 10 blue balls and 4 green balls. How many balls are there in all?
  24. 24.8 + 10 =
  25. 25.? + 6 = 7
  26. 26.1 + 2 + 17 =
  27. 27.14 + 4 =
  28. 28.3 + ? = 11
  29. 29.There are 2 yellow balloons and 3 white balloons. How many balloons are there in all?
  30. 30.7 + 3 + 2 =
  31. 31.Isha has 5 marbles and gets 10 marbles more. How many marbles does Isha have now?
  32. 32.Diya has 9 balloons and gets 7 balloons more. How many balloons does Diya have now?
  33. 33.Aditya has 14 bananas and gets 2 bananas more. How many bananas does Aditya have now?
  34. 34.15 + 1 =
  35. 35.15 + 5 =
  36. 36.9 + 10 =
  37. 37.There are 9 yellow kites and 11 white kites. How many kites are there in all?
  38. 38.There are 10 green flowers and 6 blue flowers. How many flowers are there in all?
  39. 39.? + 14 = 18
  40. 40.4 + ? = 12

Answer key

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

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