1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 357 · 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 840: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.198 + 891 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.Take 204. 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 1. What is that number?
6. 6.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 206: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 422. 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 8. What is that number?
10. 10.Take 552. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.Do the 1089 trick with 502: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 265: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
15. 15.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
17. 17.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.297 + 792 =
19. 19.Do the 1089 trick with 497: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 986: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 337: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 812. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 331. 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 2. What is that number?
27. 27.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.495 + 594 =
30. 30.396 + 693 =
31. 31.Take 781. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 104: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 499. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 773. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 168: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 127: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 622. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.792 + 297 =
40. 40.Take 398. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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