1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 562 · 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 480: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.Do the 1089 trick with 962: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
7. 7.Do the 1089 trick with 319: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.198 + 891 =
9. 9.594 + 495 =
10. 10.495 + 594 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
12. 12.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 224. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 459. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 428. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 198. Reverse its digits and take the smaller number away from the bigger one. 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.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.693 + 396 =
20. 20.Do the 1089 trick with 731: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 280: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 721. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.792 + 297 =
24. 24.Do the 1089 trick with 188: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 128: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 724: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.891 + 198 =
30. 30.Take 258. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 844. 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 3. What is that number?
33. 33.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 438. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 471. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 339: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 741. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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