1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 118 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
2. 2.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 823. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 225: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.693 + 396 =
10. 10.396 + 693 =
11. 11.792 + 297 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
13. 13.Take 239. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 326. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 711. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 163. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 942: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.297 + 792 =
22. 22.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 125. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
25. 25.Do the 1089 trick with 681: 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 3. What is that number?
27. 27.Take 439. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 278. 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 1. What is that number?
30. 30.Do the 1089 trick with 553: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 240: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.891 + 198 =
33. 33.Take 709. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
35. 35.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 974. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.198 + 891 =
38. 38.495 + 594 =
39. 39.Do the 1089 trick with 651: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 845. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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