1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 298 · 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 7. What is that number?
2. 2.Do the 1089 trick with 278: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 822. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 593. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 408: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.198 + 891 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
9. 9.Take 785. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 551. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.495 + 594 =
12. 12.Do the 1089 trick with 330: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
15. 15.Do the 1089 trick with 359: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 920. 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 4. What is that number?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
19. 19.Do the 1089 trick with 299: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 501. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.594 + 495 =
28. 28.693 + 396 =
29. 29.Do the 1089 trick with 385: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 965: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.792 + 297 =
32. 32.Take 711. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 754. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 335. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 693. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 883. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.396 + 693 =
38. 38.Do the 1089 trick with 967: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?

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