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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 618 · 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. 1.3 + 6 + 2 =
  2. 2.? + 3 = 17
  3. 3.There are 8 green balloons and 10 white balloons. How many balloons are there in all?
  4. 4.Meera has 2 pencils and gets 18 pencils more. How many pencils does Meera have now?
  5. 5.14 + 6 =
  6. 6.3 + 15 =
  7. 7.There are 10 yellow balloons and 3 red balloons. How many balloons are there in all?
  8. 8.15 + 5 =
  9. 9.2 + 8 + 7 =
  10. 10.? + 2 = 16
  11. 11.There are 5 pink kites and 15 blue kites. How many kites are there in all?
  12. 12.3 + 5 + 8 =
  13. 13.1 + ? = 16
  14. 14.Arjun has 7 mangoes and gets 10 mangoes more. How many mangoes does Arjun have now?
  15. 15.17 + 3 =
  16. 16.? + 10 = 13
  17. 17.3 + 3 + 13 =
  18. 18.There are 2 yellow balloons and 4 blue balloons. How many balloons are there in all?
  19. 19.13 + 4 =
  20. 20.4 + 8 + 2 =
  21. 21.10 + ? = 12
  22. 22.? + 3 = 11
  23. 23.7 + 11 =
  24. 24.Vivaan has 5 marbles and gets 9 marbles more. How many marbles does Vivaan have now?
  25. 25.Gurpreet has 14 crayons and gets 1 crayon more. How many crayons does Gurpreet have now?
  26. 26.? + 3 = 6
  27. 27.6 + 6 + 7 =
  28. 28.There are 7 pink kites and 3 red kites. How many kites are there in all?
  29. 29.3 + 1 + 9 =
  30. 30.There are 9 blue crayons and 8 white crayons. How many crayons are there in all?
  31. 31.There are 2 red flowers and 12 yellow flowers. How many flowers are there in all?
  32. 32.2 + 4 + 5 =
  33. 33.13 + 7 =
  34. 34.12 + 5 =
  35. 35.Ishaan has 7 bananas and gets 3 bananas more. How many bananas does Ishaan have now?
  36. 36.2 + 8 + 3 =
  37. 37.There are 8 red flowers and 6 pink flowers. How many flowers are there in all?
  38. 38.Sneha has 15 balloons and gets 1 balloon more. How many balloons does Sneha have now?
  39. 39.? + 2 = 3
  40. 40.6 + 9 =

Answer key

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

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