1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 207 · 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 650: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 104: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 355. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 765: 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 5. What is that number?
6. 6.Do the 1089 trick with 527: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
8. 8.495 + 594 =
9. 9.Do the 1089 trick with 327: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 440. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 176: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 873. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 501: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
16. 16.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 349. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 406: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 961: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 193: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.297 + 792 =
22. 22.Do the 1089 trick with 511: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 885. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.792 + 297 =
26. 26.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.198 + 891 =
28. 28.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 369. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
31. 31.Take 891. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
33. 33.Do the 1089 trick with 341: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.891 + 198 =
35. 35.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 254. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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