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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 972 · 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 blue balloons and 2 white balloons. How many balloons are there in all?
  2. 2.There are 7 yellow balls and 6 blue balls. How many balls are there in all?
  3. 3.4 + 8 + 7 =
  4. 4.17 + 1 =
  5. 5.15 + ? = 19
  6. 6.There are 5 red balls and 13 green balls. How many balls are there in all?
  7. 7.Lakshmi has 14 laddoos and gets 6 laddoos more. How many laddoos does Lakshmi have now?
  8. 8.6 + 5 + 6 =
  9. 9.There are 11 blue kites and 8 yellow kites. How many kites are there in all?
  10. 10.? + 8 = 16
  11. 11.There are 2 red balloons and 2 yellow balloons. How many balloons are there in all?
  12. 12.1 + 5 =
  13. 13.3 + 6 + 8 =
  14. 14.6 + 8 + 1 =
  15. 15.1 + ? = 19
  16. 16.16 + 3 =
  17. 17.4 + 13 =
  18. 18.Manav has 10 shells and gets 5 shells more. How many shells does Manav have now?
  19. 19.Zoya has 7 marbles and gets 5 marbles more. How many marbles does Zoya have now?
  20. 20.5 + 10 =
  21. 21.3 + ? = 5
  22. 22.3 + 1 =
  23. 23.6 + 12 =
  24. 24.7 + 6 + 1 =
  25. 25.1 + 10 =
  26. 26.There are 2 pink crayons and 16 blue crayons. How many crayons are there in all?
  27. 27.4 + 5 =
  28. 28.11 + 6 =
  29. 29.There are 4 yellow balloons and 13 white balloons. How many balloons are there in all?
  30. 30.15 + 3 =
  31. 31.Arjun has 3 shells and gets 1 shell more. How many shells does Arjun have now?
  32. 32.1 + 1 + 4 =
  33. 33.? + 1 = 3
  34. 34.2 + 3 + 1 =
  35. 35.Zoya has 15 bananas and gets 1 banana more. How many bananas does Zoya have now?
  36. 36.There are 11 red kites and 2 yellow kites. How many kites are there in all?
  37. 37.2 + ? = 5
  38. 38.9 + 9 =
  39. 39.Diya has 5 kites and gets 6 kites more. How many kites does Diya have now?
  40. 40.? + 13 = 17

Answer key

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

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