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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 156 · 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 + 2 =
  2. 2.10 + 5 =
  3. 3.? + 7 = 12
  4. 4.? + 2 = 13
  5. 5.6 + 3 + 7 =
  6. 6.1 + 7 + 9 =
  7. 7.4 + ? = 5
  8. 8.There are 10 yellow flowers and 9 blue flowers. How many flowers are there in all?
  9. 9.Priya has 13 flowers and gets 2 flowers more. How many flowers does Priya have now?
  10. 10.Rohan has 6 bananas and gets 6 bananas more. How many bananas does Rohan have now?
  11. 11.2 + ? = 11
  12. 12.? + 4 = 17
  13. 13.There are 8 blue balls and 7 green balls. How many balls are there in all?
  14. 14.1 + 15 =
  15. 15.Sneha has 13 balls and gets 3 balls more. How many balls does Sneha have now?
  16. 16.3 + 16 =
  17. 17.12 + 4 =
  18. 18.There are 11 pink kites and 4 red kites. How many kites are there in all?
  19. 19.2 + 10 =
  20. 20.? + 9 = 17
  21. 21.18 + 2 =
  22. 22.6 + 4 + 3 =
  23. 23.Ananya has 3 balls and gets 11 balls more. How many balls does Ananya have now?
  24. 24.Aarav has 12 balls and gets 2 balls more. How many balls does Aarav have now?
  25. 25.4 + 2 + 11 =
  26. 26.There are 2 green balloons and 13 yellow balloons. How many balloons are there in all?
  27. 27.Isha has 12 kites and gets 1 kite more. How many kites does Isha have now?
  28. 28.9 + 2 =
  29. 29.5 + 8 + 2 =
  30. 30.3 + ? = 12
  31. 31.There are 4 red kites and 12 pink kites. How many kites are there in all?
  32. 32.There are 2 red flowers and 6 yellow flowers. How many flowers are there in all?
  33. 33.? + 1 = 9
  34. 34.6 + ? = 7
  35. 35.There are 2 yellow balls and 14 blue balls. How many balls are there in all?
  36. 36.2 + 6 =
  37. 37.There are 3 blue crayons and 7 yellow crayons. How many crayons are there in all?
  38. 38.1 + 7 =
  39. 39.16 + 1 =
  40. 40.16 + 4 =

Answer key

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

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