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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 393 · 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. 1.8 + 3 =
  2. 2.5 + 7 + 3 =
  3. 3.Vivaan has 12 marbles and gets 6 marbles more. How many marbles does Vivaan have now?
  4. 4.? + 1 = 7
  5. 5.19 + 1 =
  6. 6.4 + 1 + 5 =
  7. 7.1 + 4 =
  8. 8.Zoya has 15 kites and gets 3 kites more. How many kites does Zoya have now?
  9. 9.Tara has 5 balloons and gets 7 balloons more. How many balloons does Tara have now?
  10. 10.Karan has 6 mangoes and gets 2 mangoes more. How many mangoes does Karan have now?
  11. 11.? + 6 = 7
  12. 12.Lakshmi has 10 mangoes and gets 7 mangoes more. How many mangoes does Lakshmi have now?
  13. 13.Arjun has 14 marbles and gets 1 marble more. How many marbles does Arjun have now?
  14. 14.1 + 6 + 7 =
  15. 15.1 + ? = 14
  16. 16.Gurpreet has 3 pencils and gets 14 pencils more. How many pencils does Gurpreet have now?
  17. 17.4 + ? = 5
  18. 18.7 + 8 =
  19. 19.7 + 8 + 3 =
  20. 20.There are 4 blue kites and 5 green kites. How many kites are there in all?
  21. 21.5 + 5 + 2 =
  22. 22.Saanvi has 7 mangoes and gets 3 mangoes more. How many mangoes does Saanvi have now?
  23. 23.3 + 2 + 12 =
  24. 24.6 + 2 + 7 =
  25. 25.? + 3 = 17
  26. 26.3 + 7 + 9 =
  27. 27.1 + ? = 6
  28. 28.3 + 3 =
  29. 29.Ananya has 2 balls and gets 18 balls more. How many balls does Ananya have now?
  30. 30.There are 3 red balloons and 15 green balloons. How many balloons are there in all?
  31. 31.Meera has 14 balloons and gets 3 balloons more. How many balloons does Meera have now?
  32. 32.2 + 2 + 7 =
  33. 33.10 + 1 =
  34. 34.1 + ? = 8
  35. 35.Aarav has 13 balls and gets 4 balls more. How many balls does Aarav have now?
  36. 36.13 + 5 =
  37. 37.9 + 9 =
  38. 38.1 + ? = 5
  39. 39.? + 3 = 4
  40. 40.6 + 8 =

Answer key

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

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