1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 462 · 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.Take 389. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 649: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 991: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 863: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.396 + 693 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
10. 10.Do the 1089 trick with 107: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.792 + 297 =
13. 13.198 + 891 =
14. 14.Do the 1089 trick with 298: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.495 + 594 =
16. 16.Do the 1089 trick with 355: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 468. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 984. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.594 + 495 =
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
22. 22.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 936: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 106. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
27. 27.Take 812. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 779. 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 5. What is that number?
30. 30.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 843. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 873: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 356: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.297 + 792 =
36. 36.Take 205. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 236. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 532: reverse and subtract, then reverse that answer and add. What do you get?

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