1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 167 · 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 543: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.297 + 792 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.Take 995. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 509: reverse and subtract, then reverse that answer and add. 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.Do the 1089 trick with 371: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 179. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 225. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 624: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 593. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 542: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.792 + 297 =
17. 17.Take 477. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 542. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 216. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 863. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
23. 23.Take 478. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
27. 27.Do the 1089 trick with 923: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 906. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 306. 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 7. What is that number?
31. 31.Take 597. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 659. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 583: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 589. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 709. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.495 + 594 =
40. 40.891 + 198 =

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