1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 568 · 40 questions

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.

1. 1.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 298: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 601: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 287: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 406. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
12. 12.Do the 1089 trick with 114: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
15. 15.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 763. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.198 + 891 =
18. 18.Take 284. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 249: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 123. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
22. 22.297 + 792 =
23. 23.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.396 + 693 =
25. 25.594 + 495 =
26. 26.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 634: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
30. 30.792 + 297 =
31. 31.Take 891. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 457. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 451: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.693 + 396 =
35. 35.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 715. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 904: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 582: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 115. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 689: reverse and subtract, then reverse that answer and add. What do you get?

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