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1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 942 · 40 questions
TalentJR

The trick (Reverse and subtract): Reverse the number and take the smaller number away from the bigger one. The answer is always one of 198, 297, 396, 495, 594, 693, 792, 891: middle digit 9, first and last digits adding to 9. Reverse that answer and add: you always get 1089.

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  1. 1.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
  2. 2.Take 721. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  3. 3.495 + 594 =
  4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
  5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
  6. 6.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  7. 7.Take 366. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  8. 8.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  9. 9.Do the 1089 trick with 822: reverse and subtract, then reverse that answer and add. What do you get?
  10. 10.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  11. 11.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
  12. 12.693 + 396 =
  13. 13.792 + 297 =
  14. 14.396 + 693 =
  15. 15.Do the 1089 trick with 552: reverse and subtract, then reverse that answer and add. What do you get?
  16. 16.Do the 1089 trick with 319: reverse and subtract, then reverse that answer and add. What do you get?
  17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
  18. 18.297 + 792 =
  19. 19.Take 462. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
  21. 21.Do the 1089 trick with 742: reverse and subtract, then reverse that answer and add. What do you get?
  22. 22.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
  23. 23.Take 519. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  24. 24.Take 578. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  25. 25.Do the 1089 trick with 370: reverse and subtract, then reverse that answer and add. What do you get?
  26. 26.Take 803. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  27. 27.Take 972. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  28. 28.594 + 495 =
  29. 29.198 + 891 =
  30. 30.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
  31. 31.Take 612. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  32. 32.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  33. 33.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
  34. 34.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
  36. 36.Take 724. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  37. 37.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  38. 38.Take 671. Reverse its digits and take the smaller number away from the bigger one. What do you get?
  39. 39.Do the 1089 trick with 854: reverse and subtract, then reverse that answer and add. What do you get?
  40. 40.Do the 1089 trick with 351: reverse and subtract, then reverse that answer and add. What do you get?

Answer key

  1. 594
  2. 594
  3. 1089
  4. 792
  5. 891
  6. 792
  7. 297
  8. 792
  9. 1089
  10. 693
  11. 1089
  12. 1089
  13. 1089
  14. 1089
  15. 1089
  16. 1089
  17. 396
  18. 1089
  19. 198
  20. 297
  21. 1089
  22. 1089
  23. 396
  24. 297
  25. 1089
  26. 495
  27. 693
  28. 1089
  29. 1089
  30. 1089
  31. 396
  32. 693
  33. 1089
  34. 891
  35. 693
  36. 297
  37. 693
  38. 495
  39. 1089
  40. 1089

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