1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 57 · 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 531: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 852: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 511. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.Do the 1089 trick with 624: 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 7. What is that number?
8. 8.Take 658. Reverse its digits and take the smaller number away from the bigger one. 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 165. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 815: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 173. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.594 + 495 =
15. 15.Take 733. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.693 + 396 =
18. 18.Take 397. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 862: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 663. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 871: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.396 + 693 =
25. 25.Take 920. Reverse its digits and take the smaller number away from the bigger one. 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.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
30. 30.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.495 + 594 =
32. 32.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.198 + 891 =
34. 34.Do the 1089 trick with 173: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.792 + 297 =
36. 36.Do the 1089 trick with 104: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 804. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 935: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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