1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 96 · 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 640: 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 4. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.297 + 792 =
6. 6.Take 360. 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 3. What is that number?
8. 8.Take 457. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.198 + 891 =
10. 10.Do the 1089 trick with 128: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 219: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.594 + 495 =
15. 15.Take 732. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 591: 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 5. What is that number?
18. 18.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 297. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.495 + 594 =
22. 22.Do the 1089 trick with 581: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
25. 25.693 + 396 =
26. 26.Take 935. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 714. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 197. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 501. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 207. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 784. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 217. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.396 + 693 =
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?

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