1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 195 · 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 705. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 974: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.891 + 198 =
4. 4.Do the 1089 trick with 813: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.594 + 495 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
8. 8.693 + 396 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.Take 962. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 247. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 557: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 219. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 644: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 179. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 406. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.297 + 792 =
20. 20.495 + 594 =
21. 21.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.198 + 891 =
23. 23.Take 378. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 266: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 459: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 668: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 517: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 286: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 391: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 326. 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 1. What is that number?
36. 36.Take 297. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 417: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 328. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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