1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 382 · 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 399. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
5. 5.792 + 297 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
7. 7.Do the 1089 trick with 365: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 127: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 346: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.891 + 198 =
13. 13.Take 521. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 794: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 692. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.495 + 594 =
17. 17.297 + 792 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
19. 19.594 + 495 =
20. 20.Take 357. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.198 + 891 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
23. 23.Take 105. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
25. 25.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 442: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 411: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 669: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 361. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
34. 34.Do the 1089 trick with 609: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 502. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 580: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 713. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 603. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 771. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 932. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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