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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 745 · 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. 1.2 + 8 + 1 =
  2. 2.3 + ? = 9
  3. 3.7 + 1 + 5 =
  4. 4.7 + 2 + 10 =
  5. 5.2 + 1 =
  6. 6.Sneha has 2 balls and gets 15 balls more. How many balls does Sneha have now?
  7. 7.Vivaan has 4 pencils and gets 16 pencils more. How many pencils does Vivaan have now?
  8. 8.15 + 4 =
  9. 9.There are 4 blue beads and 5 pink beads. How many beads are there in all?
  10. 10.There are 9 green kites and 4 yellow kites. How many kites are there in all?
  11. 11.2 + 7 + 11 =
  12. 12.7 + 3 + 6 =
  13. 13.There are 4 green balloons and 7 white balloons. How many balloons are there in all?
  14. 14.8 + 10 =
  15. 15.8 + 7 + 3 =
  16. 16.? + 2 = 4
  17. 17.15 + 1 =
  18. 18.Sneha has 14 marbles and gets 6 marbles more. How many marbles does Sneha have now?
  19. 19.Meera has 7 bananas and gets 5 bananas more. How many bananas does Meera have now?
  20. 20.6 + 4 + 8 =
  21. 21.There are 11 red balloons and 6 white balloons. How many balloons are there in all?
  22. 22.There are 10 pink crayons and 2 red crayons. How many crayons are there in all?
  23. 23.? + 8 = 15
  24. 24.There are 5 pink beads and 7 green beads. How many beads are there in all?
  25. 25.Saanvi has 15 marbles and gets 4 marbles more. How many marbles does Saanvi have now?
  26. 26.There are 9 blue crayons and 2 pink crayons. How many crayons are there in all?
  27. 27.Tara has 4 crayons and gets 11 crayons more. How many crayons does Tara have now?
  28. 28.There are 12 red crayons and 3 blue crayons. How many crayons are there in all?
  29. 29.4 + 4 + 11 =
  30. 30.There are 4 pink balls and 14 blue balls. How many balls are there in all?
  31. 31.3 + 3 + 3 =
  32. 32.? + 4 = 17
  33. 33.18 + 1 =
  34. 34.There are 7 pink kites and 6 yellow kites. How many kites are there in all?
  35. 35.11 + ? = 17
  36. 36.3 + 6 =
  37. 37.? + 1 = 7
  38. 38.4 + 15 =
  39. 39.Joseph has 14 shells and gets 2 shells more. How many shells does Joseph have now?
  40. 40.8 + ? = 9

Answer key

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

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