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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 432 · 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 + 10 =
  2. 2.There are 4 red balls and 7 green balls. How many balls are there in all?
  3. 3.4 + 3 =
  4. 4.Karan has 4 crayons and gets 13 crayons more. How many crayons does Karan have now?
  5. 5.6 + 5 + 1 =
  6. 6.2 + 2 + 5 =
  7. 7.17 + 1 =
  8. 8.Isha has 11 books and gets 1 book more. How many books does Isha have now?
  9. 9.Farhan has 3 laddoos and gets 3 laddoos more. How many laddoos does Farhan have now?
  10. 10.13 + 6 =
  11. 11.1 + 11 =
  12. 12.Ishaan has 2 mangoes and gets 17 mangoes more. How many mangoes does Ishaan have now?
  13. 13.19 + 1 =
  14. 14.8 + 5 =
  15. 15.Vivaan has 4 balls and gets 3 balls more. How many balls does Vivaan have now?
  16. 16.Aarav has 8 marbles and gets 2 marbles more. How many marbles does Aarav have now?
  17. 17.13 + 4 =
  18. 18.8 + 4 + 2 =
  19. 19.8 + 4 + 7 =
  20. 20.There are 10 blue crayons and 3 yellow crayons. How many crayons are there in all?
  21. 21.3 + 6 + 5 =
  22. 22.There are 8 pink balloons and 10 red balloons. How many balloons are there in all?
  23. 23.4 + ? = 19
  24. 24.5 + 3 + 6 =
  25. 25.12 + ? = 14
  26. 26.12 + 8 =
  27. 27.Saanvi has 13 crayons and gets 3 crayons more. How many crayons does Saanvi have now?
  28. 28.4 + 5 + 5 =
  29. 29.5 + 15 =
  30. 30.There are 7 green balloons and 8 yellow balloons. How many balloons are there in all?
  31. 31.6 + 6 =
  32. 32.12 + 6 =
  33. 33.4 + 8 =
  34. 34.3 + ? = 9
  35. 35.Riya has 2 laddoos and gets 5 laddoos more. How many laddoos does Riya have now?
  36. 36.There are 6 blue crayons and 3 yellow crayons. How many crayons are there in all?
  37. 37.3 + ? = 7
  38. 38.Manav has 2 pencils and gets 7 pencils more. How many pencils does Manav have now?
  39. 39.Dev has 12 balls and gets 8 balls more. How many balls does Dev have now?
  40. 40.There are 6 pink balls and 12 white balls. How many balls are there in all?

Answer key

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

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