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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 224 · 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.There are 12 yellow balls and 2 green balls. How many balls are there in all?
  2. 2.Ananya has 5 marbles and gets 2 marbles more. How many marbles does Ananya have now?
  3. 3.1 + 11 =
  4. 4.? + 8 = 16
  5. 5.Dev has 5 flowers and gets 12 flowers more. How many flowers does Dev have now?
  6. 6.Kavya has 8 balloons and gets 12 balloons more. How many balloons does Kavya have now?
  7. 7.Tara has 7 shells and gets 6 shells more. How many shells does Tara have now?
  8. 8.13 + 6 =
  9. 9.13 + 3 =
  10. 10.16 + ? = 20
  11. 11.There are 11 white crayons and 6 red crayons. How many crayons are there in all?
  12. 12.There are 8 blue balloons and 5 red balloons. How many balloons are there in all?
  13. 13.15 + 1 =
  14. 14.Tara has 6 flowers and gets 7 flowers more. How many flowers does Tara have now?
  15. 15.1 + 9 =
  16. 16.Rahul has 7 pencils and gets 9 pencils more. How many pencils does Rahul have now?
  17. 17.Isha has 3 balls and gets 9 balls more. How many balls does Isha have now?
  18. 18.16 + 2 =
  19. 19.Vivaan has 12 books and gets 4 books more. How many books does Vivaan have now?
  20. 20.5 + 11 =
  21. 21.There are 7 pink crayons and 9 white crayons. How many crayons are there in all?
  22. 22.12 + 4 =
  23. 23.2 + 14 =
  24. 24.6 + ? = 12
  25. 25.4 + 15 =
  26. 26.There are 4 green balls and 15 white balls. How many balls are there in all?
  27. 27.11 + 7 =
  28. 28.7 + 1 =
  29. 29.Zoya has 11 mangoes and gets 7 mangoes more. How many mangoes does Zoya have now?
  30. 30.Tara has 5 marbles and gets 3 marbles more. How many marbles does Tara have now?
  31. 31.Dev has 7 marbles and gets 10 marbles more. How many marbles does Dev have now?
  32. 32.4 + 8 + 3 =
  33. 33.1 + ? = 4
  34. 34.There are 2 blue flowers and 13 red flowers. How many flowers are there in all?
  35. 35.There are 11 blue crayons and 8 green crayons. How many crayons are there in all?
  36. 36.Tara has 9 mangoes and gets 2 mangoes more. How many mangoes does Tara have now?
  37. 37.6 + 10 =
  38. 38.Manav has 5 books and gets 8 books more. How many books does Manav have now?
  39. 39.15 + 5 =
  40. 40.? + 1 = 15

Answer key

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

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