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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 957 · 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 9 blue balloons and 2 red balloons. How many balloons are there in all?
  2. 2.There are 5 green flowers and 3 pink flowers. How many flowers are there in all?
  3. 3.14 + 4 =
  4. 4.3 + 2 + 12 =
  5. 5.1 + ? = 5
  6. 6.5 + 7 + 4 =
  7. 7.8 + 7 + 5 =
  8. 8.4 + ? = 18
  9. 9.There are 2 green balls and 11 red balls. How many balls are there in all?
  10. 10.9 + ? = 11
  11. 11.17 + 3 =
  12. 12.6 + ? = 10
  13. 13.? + 4 = 6
  14. 14.Rohan has 3 marbles and gets 9 marbles more. How many marbles does Rohan have now?
  15. 15.Ananya has 14 balls and gets 6 balls more. How many balls does Ananya have now?
  16. 16.There are 12 pink kites and 5 white kites. How many kites are there in all?
  17. 17.There are 9 yellow balloons and 8 white balloons. How many balloons are there in all?
  18. 18.Meera has 2 shells and gets 12 shells more. How many shells does Meera have now?
  19. 19.2 + 17 =
  20. 20.There are 2 pink flowers and 8 red flowers. How many flowers are there in all?
  21. 21.There are 7 yellow flowers and 4 blue flowers. How many flowers are there in all?
  22. 22.4 + 5 + 11 =
  23. 23.Zoya has 15 flowers and gets 1 flower more. How many flowers does Zoya have now?
  24. 24.8 + 7 =
  25. 25.4 + 3 =
  26. 26.4 + 10 =
  27. 27.8 + 2 =
  28. 28.9 + 8 =
  29. 29.There are 7 white balls and 7 red balls. How many balls are there in all?
  30. 30.There are 7 green balloons and 6 red balloons. How many balloons are there in all?
  31. 31.18 + 2 =
  32. 32.9 + 4 =
  33. 33.? + 3 = 20
  34. 34.2 + 8 + 3 =
  35. 35.There are 10 green flowers and 5 red flowers. How many flowers are there in all?
  36. 36.? + 5 = 20
  37. 37.Dev has 15 bananas and gets 1 banana more. How many bananas does Dev have now?
  38. 38.1 + 2 =
  39. 39.14 + 2 =
  40. 40.There are 10 blue flowers and 5 red flowers. How many flowers are there in all?

Answer key

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

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