1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 77 · 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.Take 856. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
3. 3.Take 992. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 264. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 794. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 668. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
9. 9.495 + 594 =
10. 10.198 + 891 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
12. 12.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 934: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.693 + 396 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
17. 17.Do the 1089 trick with 530: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 327. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 467. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.792 + 297 =
21. 21.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 551. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 693. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.396 + 693 =
30. 30.Take 248. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 337: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 196. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
36. 36.Do the 1089 trick with 612: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 370: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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