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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 357 · 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 = 13
  2. 2.11 + 1 =
  3. 3.8 + 8 + 1 =
  4. 4.16 + ? = 17
  5. 5.5 + ? = 17
  6. 6.There are 12 yellow flowers and 5 red flowers. How many flowers are there in all?
  7. 7.There are 5 yellow balloons and 2 blue balloons. How many balloons are there in all?
  8. 8.1 + 7 + 3 =
  9. 9.3 + ? = 5
  10. 10.10 + 2 =
  11. 11.15 + 4 =
  12. 12.1 + 6 =
  13. 13.There are 11 white kites and 8 green kites. How many kites are there in all?
  14. 14.Meera has 15 balls and gets 4 balls more. How many balls does Meera have now?
  15. 15.4 + 4 =
  16. 16.There are 8 red balloons and 3 white balloons. How many balloons are there in all?
  17. 17.7 + 2 + 9 =
  18. 18.6 + 6 + 8 =
  19. 19.Saanvi has 11 laddoos and gets 4 laddoos more. How many laddoos does Saanvi have now?
  20. 20.9 + 4 =
  21. 21.There are 3 green crayons and 15 red crayons. How many crayons are there in all?
  22. 22.Aarav has 15 mangoes and gets 1 mango more. How many mangoes does Aarav have now?
  23. 23.There are 6 white balloons and 7 green balloons. How many balloons are there in all?
  24. 24.There are 3 white flowers and 12 blue flowers. How many flowers are there in all?
  25. 25.18 + 1 =
  26. 26.? + 11 = 19
  27. 27.Joseph has 15 crayons and gets 3 crayons more. How many crayons does Joseph have now?
  28. 28.There are 4 red flowers and 5 yellow flowers. How many flowers are there in all?
  29. 29.16 + 3 =
  30. 30.15 + 2 =
  31. 31.7 + 8 + 4 =
  32. 32.4 + 7 + 8 =
  33. 33.? + 1 = 16
  34. 34.There are 3 blue kites and 5 pink kites. How many kites are there in all?
  35. 35.There are 5 green kites and 3 pink kites. How many kites are there in all?
  36. 36.17 + 2 =
  37. 37.Zoya has 9 crayons and gets 4 crayons more. How many crayons does Zoya have now?
  38. 38.10 + 6 =
  39. 39.There are 6 pink beads and 7 red beads. How many beads are there in all?
  40. 40.14 + ? = 17

Answer key

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

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