1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 68 · 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 3. What is that number?
2. 2.Take 754. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.Take 317. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.495 + 594 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
12. 12.594 + 495 =
13. 13.Take 602. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.792 + 297 =
16. 16.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 531: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.297 + 792 =
22. 22.Take 804. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 345. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
26. 26.Take 155. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 883. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 256. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.891 + 198 =
31. 31.Do the 1089 trick with 580: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 977. 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 488: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 360: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 379. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
39. 39.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 482. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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