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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 486 · 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.Meera has 7 kites and gets 6 kites more. How many kites does Meera have now?
  2. 2.10 + 1 =
  3. 3.Sneha has 2 balloons and gets 3 balloons more. How many balloons does Sneha have now?
  4. 4.? + 10 = 12
  5. 5.4 + 3 =
  6. 6.Meera has 7 shells and gets 12 shells more. How many shells does Meera have now?
  7. 7.15 + 3 =
  8. 8.? + 4 = 17
  9. 9.? + 4 = 10
  10. 10.There are 10 white balloons and 10 red balloons. How many balloons are there in all?
  11. 11.6 + ? = 9
  12. 12.9 + 9 =
  13. 13.There are 7 blue beads and 3 green beads. How many beads are there in all?
  14. 14.? + 14 = 15
  15. 15.7 + 5 + 1 =
  16. 16.15 + 1 =
  17. 17.There are 6 red balls and 6 blue balls. How many balls are there in all?
  18. 18.7 + 7 =
  19. 19.15 + 2 =
  20. 20.3 + 8 =
  21. 21.Pooja has 6 pencils and gets 10 pencils more. How many pencils does Pooja have now?
  22. 22.8 + 3 =
  23. 23.17 + 3 =
  24. 24.? + 5 = 18
  25. 25.5 + 2 =
  26. 26.7 + 3 + 1 =
  27. 27.Priya has 4 mangoes and gets 11 mangoes more. How many mangoes does Priya have now?
  28. 28.9 + 7 =
  29. 29.Diya has 14 marbles and gets 6 marbles more. How many marbles does Diya have now?
  30. 30.6 + 8 =
  31. 31.2 + 12 =
  32. 32.There are 2 green crayons and 9 white crayons. How many crayons are there in all?
  33. 33.2 + ? = 4
  34. 34.Gurpreet has 14 laddoos and gets 3 laddoos more. How many laddoos does Gurpreet have now?
  35. 35.4 + 3 + 10 =
  36. 36.11 + ? = 12
  37. 37.14 + ? = 16
  38. 38.Aditya has 7 shells and gets 8 shells more. How many shells does Aditya have now?
  39. 39.Dev has 10 balls and gets 3 balls more. How many balls does Dev have now?
  40. 40.6 + 8 + 2 =

Answer key

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

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