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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 118 · 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. 1.9 + 1 =
  2. 2.Ishaan has 5 kites and gets 4 kites more. How many kites does Ishaan have now?
  3. 3.4 + 6 + 8 =
  4. 4.There are 4 green balloons and 4 white balloons. How many balloons are there in all?
  5. 5.1 + 2 + 16 =
  6. 6.Isha has 9 crayons and gets 10 crayons more. How many crayons does Isha have now?
  7. 7.There are 12 blue kites and 2 pink kites. How many kites are there in all?
  8. 8.Nisha has 14 flowers and gets 2 flowers more. How many flowers does Nisha have now?
  9. 9.12 + ? = 13
  10. 10.There are 5 pink kites and 6 green kites. How many kites are there in all?
  11. 11.? + 1 = 18
  12. 12.2 + ? = 8
  13. 13.Diya has 14 marbles and gets 4 marbles more. How many marbles does Diya have now?
  14. 14.Karan has 4 balloons and gets 9 balloons more. How many balloons does Karan have now?
  15. 15.3 + 5 + 6 =
  16. 16.3 + 11 =
  17. 17.2 + 7 + 10 =
  18. 18.2 + ? = 4
  19. 19.? + 2 = 6
  20. 20.There are 6 pink balloons and 5 green balloons. How many balloons are there in all?
  21. 21.8 + 2 =
  22. 22.12 + 7 =
  23. 23.11 + ? = 12
  24. 24.4 + 7 + 1 =
  25. 25.There are 8 green flowers and 11 pink flowers. How many flowers are there in all?
  26. 26.1 + 1 + 3 =
  27. 27.There are 4 yellow balls and 16 red balls. How many balls are there in all?
  28. 28.5 + ? = 8
  29. 29.7 + 11 =
  30. 30.2 + 6 + 4 =
  31. 31.5 + 4 + 7 =
  32. 32.? + 5 = 12
  33. 33.16 + 2 =
  34. 34.14 + 4 =
  35. 35.There are 9 green balloons and 3 pink balloons. How many balloons are there in all?
  36. 36.12 + ? = 15
  37. 37.16 + 4 =
  38. 38.? + 10 = 11
  39. 39.There are 9 red kites and 7 yellow kites. How many kites are there in all?
  40. 40.There are 7 red balloons and 4 green balloons. How many balloons are there in all?

Answer key

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

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