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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 931 · 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 5 yellow crayons and 9 red crayons. How many crayons are there in all?
  2. 2.1 + 6 + 9 =
  3. 3.15 + 5 =
  4. 4.8 + 2 + 2 =
  5. 5.2 + 12 =
  6. 6.There are 4 blue balls and 10 red balls. How many balls are there in all?
  7. 7.There are 11 green beads and 5 white beads. How many beads are there in all?
  8. 8.2 + 17 =
  9. 9.4 + 1 + 3 =
  10. 10.Kabir has 13 crayons and gets 2 crayons more. How many crayons does Kabir have now?
  11. 11.There are 10 red balloons and 8 white balloons. How many balloons are there in all?
  12. 12.? + 6 = 20
  13. 13.Meera has 9 bananas and gets 10 bananas more. How many bananas does Meera have now?
  14. 14.There are 11 green kites and 7 red kites. How many kites are there in all?
  15. 15.4 + 12 =
  16. 16.There are 9 green flowers and 4 blue flowers. How many flowers are there in all?
  17. 17.3 + 7 + 6 =
  18. 18.There are 7 yellow flowers and 4 red flowers. How many flowers are there in all?
  19. 19.5 + 13 =
  20. 20.? + 7 = 8
  21. 21.Zoya has 15 shells and gets 2 shells more. How many shells does Zoya have now?
  22. 22.15 + 2 =
  23. 23.Arjun has 9 shells and gets 7 shells more. How many shells does Arjun have now?
  24. 24.There are 2 pink balloons and 8 white balloons. How many balloons are there in all?
  25. 25.2 + 1 =
  26. 26.? + 3 = 4
  27. 27.? + 5 = 7
  28. 28.18 + ? = 19
  29. 29.3 + 7 + 9 =
  30. 30.There are 7 pink balloons and 13 green balloons. How many balloons are there in all?
  31. 31.14 + 3 =
  32. 32.12 + 4 =
  33. 33.2 + 6 =
  34. 34.3 + 1 + 16 =
  35. 35.6 + 1 + 6 =
  36. 36.? + 12 = 17
  37. 37.8 + 1 + 1 =
  38. 38.6 + 1 + 4 =
  39. 39.Gurpreet has 13 balls and gets 3 balls more. How many balls does Gurpreet have now?
  40. 40.14 + ? = 16

Answer key

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

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