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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 78 · 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. 1.7 + 3 =
  2. 2.Priya has 10 mangoes and gets 1 mango more. How many mangoes does Priya have now?
  3. 3.Tara has 4 balloons and gets 15 balloons more. How many balloons does Tara have now?
  4. 4.4 + 1 + 5 =
  5. 5.Aarav has 15 balls and gets 5 balls more. How many balls does Aarav have now?
  6. 6.? + 9 = 15
  7. 7.1 + 3 + 1 =
  8. 8.10 + ? = 14
  9. 9.Saanvi has 10 mangoes and gets 8 mangoes more. How many mangoes does Saanvi have now?
  10. 10.Isha has 14 mangoes and gets 1 mango more. How many mangoes does Isha have now?
  11. 11.2 + 4 + 12 =
  12. 12.? + 4 = 8
  13. 13.Rohan has 7 flowers and gets 4 flowers more. How many flowers does Rohan have now?
  14. 14.19 + 1 =
  15. 15.Arjun has 8 balls and gets 7 balls more. How many balls does Arjun have now?
  16. 16.There are 11 yellow crayons and 2 white crayons. How many crayons are there in all?
  17. 17.There are 6 green balloons and 5 yellow balloons. How many balloons are there in all?
  18. 18.1 + 4 + 1 =
  19. 19.? + 9 = 12
  20. 20.6 + ? = 7
  21. 21.2 + 18 =
  22. 22.There are 2 blue flowers and 10 yellow flowers. How many flowers are there in all?
  23. 23.6 + 2 + 12 =
  24. 24.4 + ? = 5
  25. 25.8 + 8 + 1 =
  26. 26.There are 3 green flowers and 4 red flowers. How many flowers are there in all?
  27. 27.9 + 3 =
  28. 28.4 + 5 + 2 =
  29. 29.Kavya has 5 kites and gets 14 kites more. How many kites does Kavya have now?
  30. 30.17 + 3 =
  31. 31.10 + ? = 19
  32. 32.7 + 5 + 6 =
  33. 33.There are 5 white balloons and 12 green balloons. How many balloons are there in all?
  34. 34.6 + 8 + 4 =
  35. 35.14 + 4 =
  36. 36.? + 6 = 13
  37. 37.? + 15 = 18
  38. 38.Saanvi has 9 balls and gets 2 balls more. How many balls does Saanvi have now?
  39. 39.Diya has 3 crayons and gets 17 crayons more. How many crayons does Diya have now?
  40. 40.1 + 1 + 2 =

Answer key

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

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