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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 487 · 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 + 12 =
  2. 2.Dev has 4 crayons and gets 5 crayons more. How many crayons does Dev have now?
  3. 3.Diya has 11 crayons and gets 8 crayons more. How many crayons does Diya have now?
  4. 4.There are 3 yellow kites and 13 green kites. How many kites are there in all?
  5. 5.8 + 7 =
  6. 6.Lakshmi has 8 mangoes and gets 7 mangoes more. How many mangoes does Lakshmi have now?
  7. 7.Rohan has 10 shells and gets 5 shells more. How many shells does Rohan have now?
  8. 8.1 + 17 =
  9. 9.Aarav has 6 flowers and gets 11 flowers more. How many flowers does Aarav have now?
  10. 10.Diya has 13 bananas and gets 4 bananas more. How many bananas does Diya have now?
  11. 11.2 + 9 =
  12. 12.18 + ? = 19
  13. 13.There are 4 red balls and 8 yellow balls. How many balls are there in all?
  14. 14.Diya has 12 crayons and gets 2 crayons more. How many crayons does Diya have now?
  15. 15.3 + ? = 13
  16. 16.Aditya has 2 marbles and gets 6 marbles more. How many marbles does Aditya have now?
  17. 17.There are 8 red kites and 6 blue kites. How many kites are there in all?
  18. 18.18 + 1 =
  19. 19.15 + 1 =
  20. 20.7 + 7 =
  21. 21.7 + 7 + 3 =
  22. 22.3 + 3 =
  23. 23.Nisha has 2 marbles and gets 9 marbles more. How many marbles does Nisha have now?
  24. 24.? + 4 = 17
  25. 25.5 + 6 + 6 =
  26. 26.4 + ? = 9
  27. 27.12 + 4 =
  28. 28.? + 8 = 18
  29. 29.? + 3 = 17
  30. 30.Tara has 14 balloons and gets 6 balloons more. How many balloons does Tara have now?
  31. 31.4 + 8 + 3 =
  32. 32.Ananya has 4 shells and gets 15 shells more. How many shells does Ananya have now?
  33. 33.8 + 2 + 4 =
  34. 34.There are 8 white kites and 8 blue kites. How many kites are there in all?
  35. 35.12 + 3 =
  36. 36.8 + ? = 12
  37. 37.There are 8 pink flowers and 10 blue flowers. How many flowers are there in all?
  38. 38.5 + 1 =
  39. 39.Tara has 4 kites and gets 10 kites more. How many kites does Tara have now?
  40. 40.There are 4 blue crayons and 6 red crayons. How many crayons are there in all?

Answer key

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

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