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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 403 · 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.? + 6 = 16
  2. 2.4 + ? = 14
  3. 3.? + 2 = 11
  4. 4.1 + 8 + 1 =
  5. 5.1 + ? = 11
  6. 6.5 + 6 + 9 =
  7. 7.? + 2 = 3
  8. 8.15 + 2 =
  9. 9.Kavya has 4 kites and gets 1 kite more. How many kites does Kavya have now?
  10. 10.3 + 2 + 3 =
  11. 11.There are 12 red balloons and 4 yellow balloons. How many balloons are there in all?
  12. 12.7 + 1 + 6 =
  13. 13.There are 12 red balloons and 4 blue balloons. How many balloons are there in all?
  14. 14.Kabir has 5 laddoos and gets 3 laddoos more. How many laddoos does Kabir have now?
  15. 15.Aditya has 13 pencils and gets 1 pencil more. How many pencils does Aditya have now?
  16. 16.5 + 3 + 1 =
  17. 17.? + 7 = 9
  18. 18.Zoya has 13 pencils and gets 2 pencils more. How many pencils does Zoya have now?
  19. 19.1 + ? = 5
  20. 20.There are 6 green kites and 3 red kites. How many kites are there in all?
  21. 21.13 + 7 =
  22. 22.5 + 5 + 3 =
  23. 23.7 + 2 + 3 =
  24. 24.Zoya has 14 balls and gets 1 ball more. How many balls does Zoya have now?
  25. 25.6 + ? = 13
  26. 26.Saanvi has 2 mangoes and gets 8 mangoes more. How many mangoes does Saanvi have now?
  27. 27.1 + 6 + 7 =
  28. 28.17 + 1 =
  29. 29.There are 8 yellow beads and 11 pink beads. How many beads are there in all?
  30. 30.Riya has 14 shells and gets 2 shells more. How many shells does Riya have now?
  31. 31.11 + ? = 18
  32. 32.9 + 4 =
  33. 33.4 + 8 =
  34. 34.1 + 1 + 12 =
  35. 35.4 + 2 + 5 =
  36. 36.Aarav has 12 pencils and gets 3 pencils more. How many pencils does Aarav have now?
  37. 37.6 + 6 + 1 =
  38. 38.Isha has 5 mangoes and gets 8 mangoes more. How many mangoes does Isha have now?
  39. 39.2 + ? = 5
  40. 40.Nisha has 2 crayons and gets 13 crayons more. How many crayons does Nisha have now?

Answer key

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

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